Katyusha rocket launcher

The Katyusha multiple rocket launcher (Russian: Катю́ша, IPA: [kɐˈtʲuʂə] (listen)) is a type of rocket artillery first built and fielded by the Soviet Union in World War II. Multiple rocket launchers such as these deliver explosives to a target area more quickly than conventional artillery, but with lower accuracy and requiring a longer time to reload. They are fragile compared to artillery guns, but are inexpensive, easy to produce, and usable on any chassis. The Katyushas of World War II, the first self-propelled artillery mass-produced by the Soviet Union,[1] were usually mounted on ordinary trucks. This mobility gave the Katyusha, and other self-propelled artillery, another advantage: being able to deliver a large blow all at once, and then move before being located and attacked with counter-battery fire.

Katyusha
BM-13 Katyusha multiple rocket launcher, based on a ZIS-6 truck, in the National Museum of the History of Ukraine in the Second World War, Kiev.
Type	Multiple rocket launcher
Place of origin	Soviet Union
Service history
In service	1939–present
Used by	Soviet Union, and others
Wars	World War II Korean War Vietnam War Cambodian–Vietnamese War Yom Kippur War Iran–Iraq War Uganda–Tanzania War 2006 Lebanon War Libyan Civil War (2011) Syrian Civil War Iraqi Civil War (2014–2017) Yemeni Civil War (2015–present) Saudi Arabian-led intervention in Yemen
Production history
Designer	Georgy Langemak
Manufacturer	Plant Comintern in Voronezh
Produced	1941
No. built	~100,000
Variants	BM-13, BM-8, BM-31, BM-14, BM-21 Grad, BM-24, BM-25, BM-27, BM-30

Katyusha weapons of World War II included the BM-13 launcher, light BM-8, and heavy BM-31. Today, the nickname is also applied to newer truck-mounted post-Soviet – in addition to non-Soviet – multiple rocket launchers, notably the common BM-21 Grad and its derivatives.

Although this type of weapon has existed since the 15th century (Leonardo da Vinci having perfected a similar machine), the design of the Katyusha may have been influenced by Giuseppe Fieschi's Machine infernale - Fieschi was honored in a religious service at a Moscow church at the prompting of Soviet General Kotskov, the inventor of the Katyusha rocket launcher.[2]

Nickname

Initially, concerns for secrecy kept the military designation of the Katyushas from being known by the soldiers who operated them. They were called by code names such as Kostikov guns, after the head of the RNII, the Reaction-Engine Scientific Research Institute, and finally classed as Guards Mortars.[3] The name BM-13 was only allowed into secret documents in 1942, and remained classified until after the war.[4]

Because they were marked with the letter K (for Voronezh Komintern Factory)[5],[4] Red Army troops adopted a nickname from Mikhail Isakovsky's popular wartime song, "Katyusha", about a girl longing for her absent beloved, who has gone away on military service.[6] Katyusha is the Russian equivalent of Katie, an endearing diminutive form of the name Katherine: Yekaterina →Katya →Katyusha.

German troops coined the nickname "Stalin's organ" (German: Stalinorgel), after Soviet leader Joseph Stalin, comparing the visual resemblance of the launch array to a pipe organ, and the sound of the weapon's rocket motors, a distinctive howling sound which terrified the German troops,[7] adding a psychological warfare aspect to their use. Weapons of this type are known by the same name in Denmark (Danish: Stalinorgel), Finland (Finnish: Stalinin urut), France (French: orgue de Staline), Norway (Norwegian: Stalinorgel), the Netherlands and Belgium (Dutch: Stalinorgel), Hungary (Hungarian: Sztálinorgona), Spain and other Spanish-speaking countries (Spanish: Órganos de Stalin) as well as in Sweden (Swedish: Stalinorgel).[6]

The heavy BM-31 launcher was also referred to as Andryusha (Андрюша, an affectionate diminutive of "Andrew").[8]

World War II

A battery of Katyusha launchers fires at German forces during the Battle of Stalingrad, 6 October 1942

Katyusha rocket launchers, which were invented in Voronezh, were mounted on many platforms during World War II, including on trucks, artillery tractors, tanks, and armoured trains, as well as on naval and riverine vessels as assault support weapons. Soviet engineers also mounted single Katyusha rockets on lengths of railway track to serve in urban combat.

The design was relatively simple, consisting of racks of parallel rails on which rockets were mounted, with a folding frame to raise the rails to launch position. Each truck had 14 to 48 launchers. The M-13 rocket of the BM-13 system was 80 cm (2 ft 7 in) long, 13.2 cm (5.2 in) in diameter and weighed 42 kg (93 lb).

The weapon is less accurate than conventional artillery guns, but is extremely effective in saturation bombardment, and was particularly feared by German soldiers. A battery of four BM-13 launchers could fire a salvo in 7–10 seconds that delivered 4.35 tons of high explosives over a 400,000-square-metre (4,300,000 sq ft) impact zone,[3] making its power roughly equivalent to that of 72 conventional artillery guns. With an efficient crew, the launchers could redeploy to a new location immediately after firing, denying the enemy the opportunity for counterbattery fire. Katyusha batteries were often massed in very large numbers to create a shock effect on enemy forces. The weapon's disadvantage was the long time it took to reload a launcher, in contrast to conventional guns which could sustain a continuous low rate of fire.

Development

BM-13N Katyusha on a Lend-Lease Studebaker US6 2½-ton 6x6 truck, at the Museum of the Great Patriotic War, Moscow (2006)

BM-31-12 on ZIS-12 at the Museum (Diorama) on Sapun Mountain, Sevastopol

Postwar Katyusha on a ZIL-157 truck

Reloading a BM-13

An M13 rocket for the Katyusha launcher on display in Musée de l'Armée.

In June 1938, the Soviet Reaction-Engine Scientific Research Institute (RNII) in Moscow was authorized by the Main Artillery Directorate (GAU) to develop a multiple rocket launcher for the RS-132 aircraft rocket (RS for Reaktivnyy Snaryad, 'rocket-powered shell').[9] I. Gvay led a design team in Chelyabinsk, Russia, which built several prototype launchers firing the modified 132 mm M-132 rockets over the sides of ZiS-5 trucks. These proved unstable, and V.N. Galkovskiy proposed mounting the launch rails longitudinally. In August 1939, the result was the BM-13 (BM stands for боевая машина (translit. boyevaya mashina), 'combat vehicle' for M-13 rockets).[1]

The first large-scale testing of the rocket launchers took place at the end of 1938, when 233 rounds of various types were used. A salvo of rockets could completely straddle a target at a range of 5,500 metres (3.4 mi). But the artillery branch was not fond of the Katyusha, because it took up to 50 minutes to load and fire 24 rounds, while a conventional howitzer could fire 95 to 150 rounds in the same time. Testing with various rockets was conducted through 1940, and the BM-13-16 with launch rails for sixteen rockets was authorized for production. Only forty launchers were built before Germany invaded the Soviet Union in June 1941.[6]

After their success in the first month of the war, mass production was ordered and the development of other models proceeded. The Katyusha was inexpensive and could be manufactured in light industrial installations which did not have the heavy equipment to build conventional artillery gun barrels.[3] By the end of 1942, 3,237 Katyusha launchers of all types had been built, and by the end of the war total production reached about 10,000.[10]

The truck-mounted Katyushas were installed on ZiS-6 6×4 trucks, as well as the two-axle ZiS-5 and ZiS-5V. In 1941, a small number of BM-13 launchers were mounted on STZ-5 artillery tractors. A few were also tried on KV tank chassis as the KV-1K, but this was a needless waste of heavy armour. Starting in 1942, they were also mounted on various British, Canadian and U.S. Lend-Lease trucks, in which case they were sometimes referred to as BM-13S. The cross-country performance of the Studebaker US6 2½-ton 6x6 truck was so good that it became the GAU's standard mounting in 1943, designated BM-13N (normalizovanniy, 'standardized'), and more than 1,800 of this model were manufactured by the end of World War II.[11] After World War II, BM-13s were based on Soviet-built ZiS-151 trucks.

The 82 mm BM-8 was approved in August 1941, and deployed as the BM-8-36 on truck beds and BM-8-24 on T-40 and T-60 light tank chassis. Later these were also installed on GAZ-67 jeeps as the BM-8-8, and on the larger Studebaker trucks as the BM-8-48.[3] In 1942, the team of scientists Leonid Shvarts, Moisei Komissarchik and engineer Yakov Shor received the Stalin prize for the development of the BM-8-48.[12][13]

Based on the M-13, the M-30 rocket was developed in 1942. Its bulbous warhead required it to be fired from a grounded frame, called the M-30 (single frame, four round; later double frame, 8 round), instead of a launch rail mounted on a truck. In 1944 it became the basis for the BM-31-12 truck-mounted launcher.[3]

A battery of BM-13-16 launchers included four firing vehicles, two reload trucks and two technical support trucks, with each firing vehicle having a crew of six. Reloading was executed in 3–4 minutes, although the standard procedure was to switch to a new position some 10 km away due to the ease with which the battery could be identified by the enemy. Three batteries were combined into a division (company), and three divisions into a separate mine-firing regiment of rocket artillery.

Variants

Soviet World War II rocket systems were named according to standard templates which are the following:

• BM-x-y (names used for ground vehicles)
• M-x-y (names used for towed trailers and sledges)
• y-M-x (names used for navy)

where:

• x is a model of a missile.
• y is a number of launch rails/tubes.

In particular, BM-8-16 is a vehicle which fires M-8 missiles and has 16 rails. BM-31-12 is a vehicle which fires M-31 missiles and has 12 launch tubes. Short names such as BM-8 or BM-13 were used too. Number of launch rails/tubes is absent here. Such names describe launchers only no matter what vehicle they are mounted on. In particular BM-8-24 had a number of variants: vehicle mounted (ZiS-5 truck), tank mounted (T-40) and tractor mounted (STZ-3). All of them had the same name: BM-8-24. Other launchers had a number of variants mounted on different vehicles too. Typical set of vehicles for soviet missile systems is the following:

• ZIS-5 (truck),
• ZIS-6 (truck),
• GAZ-AA (truck),
• STZ-5 (tractor),
• T-40 (tank),
• Studebaker US6 (truck),
• Armored train car,
• River boat,
• Towed sledge,
• Towed trailer,
• Backpack (portable variant, so called "mountain Katyusha"),
• ZiS-151 (truck, used after the war);

Note: There was also an experimental KV-1K – Katyusha mounted on KV-1 tank which was not taken in service.

A list of some implementations of the Katyusha follows:[14][15][16]

Caliber (mm)	Tubes/ rails	Weapon name	Chassis
82	1	BM-8	Improvised vehicle mount, towed trailer or sled
82	6	M-8-6	Towed trailer or sled
82	8	BM-8-8	Willys MB Jeep
82	12	M-8-12	Towed trailer or sled
82	16	16-M-8	Project 1125 armored river boat
82	24	BM-8-24	T-40 light tank, T-60 light tank
82	24	24-M-8	Project 1125 armored river boat
82	36	BM-8-36	ZiS-5 truck, ZiS-6 truck
82	40	BM-8-40	Towed trailer, GAZ-AA truck
82	48	BM-8-48	ZiS-6 truck, Studebaker US6 U3 truck, rail carriage
82	72	BM-8-72	Rail carriage
132	24	BM-13	ZIS-6 truck, improvised vehicle mount, towed trailer or sled
132	6	6-M-13	Project 1125 armored river boat
132	16	BM-13-16	International K7 "Inter" truck, International M-5-5-318 truck, Fordson WO8T truck, Ford/Marmon-Herrington HH6-COE4 truck, Chevrolet G-7117 truck, Studebaker US6 U3 truck, GMC CCKW-352M-13 truck, rail carriage
300	4	M-20-4	Towed trailer
300	4	M-30-4	Towed trailer
300	8	M-31-8	Towed trailer
300	12	BM-31-12	Studebaker US6 U3 truck

Rocket variants

Rockets used in the above implementations were:[15]

Weapon name	Caliber (mm)	Range (max)	Warhead
M-8	82	5,900 m (6,500 yd)	0.64 kg (1.4 lb)
M-13	132	8,740 m (9,560 yd)	4.9 kg (11 lb)
M-13DD	132	11,800 m (12,900 yd)	4.9 kg (11 lb)
M-13UK	132	7,900 m (8,600 yd)	4.9 kg (11 lb)
M-20	132	5,050 m (5,520 yd)	18.4 kg (41 lb)
M-30	300	2,800 m (3,100 yd)	28.9 kg (64 lb)
M-31	300	4,325 m (4,730 yd)	28.9 kg (64 lb)
M-31UK	300	4,000 m (4,400 yd)	28.9 kg (64 lb)

The M-8 and M-13 rocket could also be fitted with smoke warheads, although this was not common.

Combat history

The multiple rocket launchers were top secret in the beginning of World War II. A special unit of the NKVD troops was raised to operate them.[3] On July 14, 1941, an experimental artillery battery of seven launchers was first used in battle at Orsha in the Vitebsk Region of Belarus, under the command of Captain Ivan Flyorov, destroying a concentration of German troops with tanks, armored vehicles and trucks at the marketplace, causing massive German Army casualties and its retreat from the town in panic. Following the success, the Red Army organized new Guards mortar batteries for the support of infantry divisions. A battery's complement was standardized at four launchers. They remained under NKVD control until German Nebelwerfer rocket launchers became common later in the war.[10]

On August 8, 1941, Stalin ordered the formation of eight special Guards mortar regiments under the direct control of the Reserve of the Supreme High Command (RVGK). Each regiment comprised three battalions of three batteries, totalling 36 BM-13 or BM-8 launchers. Independent Guards mortar battalions were also formed, comprising 12 launchers in three batteries of four. By the end of 1941, there were eight regiments, 35 independent battalions, and two independent batteries in service, fielding a total of 554 launchers.[17]

In June 1942 heavy Guards mortar battalions were formed around the new M-30 static rocket launch frames, consisting of 96 launchers in three batteries. In July, a battalion of BM-13s was added to the establishment of a tank corps.[18] In 1944, the BM-31 was used in motorized heavy Guards mortar battalions of 48 launchers. In 1943, Guards mortar brigades, and later divisions, were formed equipped with static launchers.[17]

By the end of 1942, 57 regiments were in service—together with the smaller independent battalions, this was the equivalent of 216 batteries: 21% BM-8 light launchers, 56% BM-13, and 23% M-30 heavy launchers. By the end of the war, the equivalent of 518 batteries were in service.[17]

Post-war development

Russian forces use BM-27 Uragan rocket launchers during the Second Chechen War

The success and economy of multiple rocket launchers (MRL) have led them to continue to be developed. In the years following WWII, the BM-13 was replaced by the 140 mm BM-14 and the BM-31 was replaced by the 240 mm BM-24.[19] During the Cold War, the Soviet Union fielded several models of Katyusha-like MRL, notably the BM-21 Grad launchers somewhat inspired by the earlier weapon, and the larger BM-27 Uragan. Advances in artillery munitions have been applied to some Katyusha-type multiple launch rocket systems, including bomblet submunitions, remotely deployed land mines, and chemical warheads.

With the breakup of the Soviet Union, Russia inherited most of its military arsenal including its large complement of MRLs. In recent history, they have been used by Russian forces during the First and Second Chechen Wars and by Armenian and Azerbaijani forces during the Nagorno-Karabakh War. Georgian government forces are reported to have used BM-21 Grad or similar rocket artillery in fighting in the 2008 South Ossetia war.[20]

Katyusha-like launchers were exported to Afghanistan, Angola, Czechoslovakia, Egypt, East Germany, Hungary, Iran, Iraq, Mongolia, North Korea, Poland, Syria, Yemen and Vietnam. They were also built in Czechoslovakia,[21] the People's Republic of China, North Korea, and Iran.

Proper Katyushas (BM-13s) also saw action in the Korean War, used by the Chinese People's Volunteer Army against the South and United Nations forces.[22] Soviet BM-13s were known to have been imported to China before the Sino-Soviet split and were operational in the People's Liberation Army.

Israel captured BM-24 MRLs during the Six-Day War (1967), used them in two battalions during the Yom Kippur War (1973) and the 1982 Lebanon War, and later developed the MAR-240 launcher for the same rockets, based on a Sherman tank chassis.

The rockets were employed by the Tanzania People's Defence Force in the Uganda-Tanzania War. Tanzanian forces called them Baba Mtakatifu (Kiswahili for "Holy Father") while the Ugandans called them Saba Saba.[23]

During the 2006 Lebanon War, Hezbollah fired between 3,970 and 4,228 rockets, from light truck-mounts and single-rail man-portable launchers. About 95% of these were 122 mm (4.8 in) Syrian-manufactured M-21OF type artillery rockets which carried warheads up to 30 kg (66 lb) and had a range of 20 km, perhaps up to 30 km (19 mi).[24][24][25][26][27] Most rockets fired at Israel from the Gaza Strip are of the simpler Qassam rocket type, but Hamas has also launched 122-mm Grad-type Katyusha rockets against several cities in Israel,[28] although they are not reported to have truck-mounted launchers. Although Katyusha originally referred to the mobile launcher, today the rockets are often referred to as Katyushas.

Some allege that the CIA bought Katyushas from the Egyptian military and supplied them to the Mujahideen (via Pakistan's ISI) during the Soviet Afghan war.[29]

Katyusha-like MRLs were also allegedly used by the Rwandan Patriotic Front during its 1990 invasion of Rwanda, through the 1994 genocide. They were effective in battle, but translated into much anti-Tutsi sentiment in the local media.[30]

It was reported that BM-21 Grad launchers were used against American forces during the 2003 invasion of Iraq. They have also been used in the Afghanistan and Iraq insurgencies. In Iraq, according to Associated Press and Agence France-Presse reports, Katyusha-like rockets were fired at the Green Zone late March 2008.[31][32]

Katyusha rockets were reportedly used by both Gaddafi Loyalists and anti-Gaddafi forces during the Libyan Civil War.[33]

In February 2013, the Defence Ministry of Yemen reported seizing an Iranian ship, and that the ship's cargo included (among its other weapons) Katyusha rockets.[34]

On May 19, 2019, a Katyusha rocket was fired inside the Green Zone in Baghdad, Iraq, landing less than a mile from the US Embassy near the statue of the Unknown Soldier. No casualties were reported.[35]

On January 4, 2020, four Katyusha rockets were fired in the Baghdad area. According to two Iraqi police sources and an official Iraqi military statement, one Katyusha rocket landed in the Green Zone in Celebration Square near the U.S. Embassy and another landed in the nearby Jadriya neighborhood. Two other Katyusha rockets landed in the Balad air base, which houses U.S. troops, according to two security sources.[36][37][38]

See also

• Hwacha, Korean gunpowder-based flaming arrow launcher from the 1500s
• Congreve rocket, British military weapon designed by Sir William Congreve in 1804
• Nebelwerfer, the most common barrage rocket series employed by the Wehrmacht in World War II
• Panzerwerfer, German rocket launcher mounted on a half-track
• Wurfrahmen 40, another German rocket launcher mounted on a half-track
• Land Mattress, employed by Allied forces in World War II
• T34 Calliope, rocket launcher mounted on M-4 Sherman tank chassis. Last vehicle-mounted highly-mobile multiple-rocket launcher by US land forces, before abandoning this concept till the latter's concept comeback in the mid-1980s.
• List of rocket artillery

References

Notes

1. Zaloga, p 150.
2. Cyrille Kalinov (2012). Les maréchaux soviétiques parlent. Perrin. pp. 225–226.
3. Zaloga, p 154.
4. Viktor Suvorov (1982), Inside the Soviet Army, p 207. Prentice Hall, ISBN 0-02-615500-1.
5. Trigg, Jonathan (2018-07-15). Voices of the Scandinavian Waffen-SS: The Final Testament of Hitler's Vikings. Amberley Publishing Limited. ISBN 978-1-4456-7469-8.
6. Zaloga, p 153.
7. Carell, Paul (1964). Hitler's war on Russia: the story of the German defeat in the East. Harrap. p. 98.
8. Gordon L. Rottman (2007), FUBAR (F***ed Up Beyond All Recognition): Soldier Slang of World War II, p 279, Osprey, ISBN 1-84603-175-3.
9. АКИМОВ В.Н., КОРОТЕЕВ А.С., ГАФАРОВ А.А. и другие (2003). "Оружие победы — «Катюша»". Исследовательский центр имени М. В. Келдыша. 1933-2003 : 70 лет на передовых рубежах ракетно-космической техники. М: "Машиностроение". pp. 92–101. ISBN 5-217-03205-7.CS1 maint: multiple names: authors list (link)
10. Zaloga, pp 154–55.
11. Zaloga, pp 153–54.
12. Rachel Bayvel, "Tales of 'Tank City'. Rachel Bayvel Celebrates the Soviet Jews Who Produced Weapons for Allied Victory Archived 2009-01-31 at the Wayback Machine". Jewish Quarterly no. 198, summer 2005. Retrieved on 2008-09-30.
13. Yosif Kremenetsky (1999), "Inzhenerno-tekhnicheskaya deyatel’nost’ yevreyev v SSSR Archived 2013-02-22 at Archive.today (Engineering-technical activities of Jews in the USSR)", Yevrey pri bol’shevistskom stroye (Jews in the Bolshevist order), Minneapolis. Retrieved on 2008-09-30.
14. Porter, pp 158–65.
15. Chris Bishop (2002). The encyclopedia of weapons of World War II. Sterling Publishing Company. pp. 173–174. ISBN 1-58663-762-2.
16. Soviet military review. Krasnaya Zvezda Publishing House. 1974. p. 13.
17. Zaloga, p 155.
18. Zaloga, p 147.
19. The BM-24-12 in the IDF
20. "Georgia pounds breakaway capital". Reuters. 2008-08-08. Retrieved 2008-09-30.
21. The RM-51 and RM-70 models.
22. Rottman, Gordon L. (December 2002). Korean War Order of Battle: United States, United Nations, and Communist Ground, Naval, and Air Forces, 1950-1953. Praeger. p. 198. ISBN 978-0-275-97835-8.
23. Lubega, Henry (26 April 2014). "Revisiting the Tanzania-Uganda war that toppled Amin". Daily Monitor. Retrieved 10 January 2018.
24. "Hizballah's Rocket Campaign Against Northern Israel: A Preliminary Report". Jerusalem Center for Public Affairs. 2006-08-31. Retrieved 2006-09-14.
25. "Hezbollah's rocket force". BBC News Online. 2006-07-18. Retrieved 2006-09-14.
26. "Mideast War, by the numbers". Guardian. Associated Press. 2006-08-18. Archived from the original on December 18, 2006. Retrieved 2006-08-25.
27. "The war in numbers". Jane's Defence Weekly. August 23, 2006.
28. "Iranian made rocket strikes Ashkelon – Ashkelon". Jeruselum Post. Archived from the original on 2011-05-11. Retrieved 2008-05-15.
29. Charlie Wilson's War: The Extraordinary Story of the Largest Covert Operation in History, George Crile, 2003, Grove/Atlantic.
30. "RTLM Tape 0084". SurplusKnowledge. Archived from the original on 2009-07-25. Retrieved 2009-06-20.
31. "Baghdad Green Zone hit by rockets". Agence France-Presse. 2008-03-26. Retrieved 2008-09-30.
32. "Front Row for Green Zone Mortar Salvos". Associated Press. 2008-03-25. Archived from the original on 28 March 2008. Retrieved 2008-09-30.
33. "Libyan rebels 'receive foreign training'". aljazeera.net.
34. "The World: Yemen says seized Iranian ship had weapons". The Monterey County Herald. Retrieved 7 February 2013.
35. Abdul-Zahra, Qassim; Mroue, Bassem. "Katyusha rocket crashes into Baghdad Green Zone; no casualties". www.timesofisrael.com. Retrieved 2019-05-23.
36. "Multiple rockets fall in Baghdad, air base". www.dailystar.com.lb. Retrieved 2020-01-04.
37. "Rockets fall near U.S. Embassy, no casualties, police sources". www.nytimes.com. Retrieved 2020-01-04.
38. "Two Rockets Fall Inside Iraqi Air Base Housing U.S. Troops: Security Sources". www.nytimes.com. Retrieved 2020-01-04.

Bibliography

• Porter, David (2009). The Essential Vehicle Identification Guide: Soviet Tanks Units 1939–45. London: Amber Books. pp. 158–165. ISBN 978-1-906626-21-1.
• Zaloga, Steven J.; James Grandsen (1984). Soviet Tanks and Combat Vehicles of World War Two. London: Arms and Armour Press. pp. 150–54. ISBN 0-85368-606-8.

Further reading

• Prenatt, Jamie and Hook, Adam (2016) Katyusha – Russian Multiple Rocket Launchers 1941–Present, Oxford: Osprey Publishing Ltd. ISBN 978 1 4728 1086 1

External links

• Photos of various mounts of Katyushas
• "Creation and Development of Rocket Artillery in the First Phase of the War", translation of a 1976 article published by the USSR Defence Ministry (broken link, see archive)
• Photo of a Cuban BM-21 in Angola