On June 22nd, 1941, the Vermach launched Operation Barbar Roa with approximately 3,000 tanks and 7,000 artillery pieces across a 2,900 km front. Within weeks, the Red Army’s gun parks were being swallowed whole. At Minsk alone, German forces captured 1,400 guns alongside 2,500 tanks and 300,000 prisoners. By December 1941, Soviet artillery losses exceeded 24,000 tubes.

 Nearly 3/4 of the 33,000 pieces the Red Army had fielded at the war’s start. Rifle divisions across the front reported holding 40% or less of their authorized gun strength. The crisis went deeper than numbers. Conventional artillery required precision machined recoil mechanisms, rifled barrels, and breach blocks. work demanding specialized heavy equipment and skilled machinists.

Lennengrad’s Kiraof plant, one of the Soviet Union’s most important industrial complexes, saw its output collapse after the German encirclement began on September 8th. Factories across Western Russia evacuated thousands of kilometers to the Eurals, halting production for weeks. Meanwhile, Army Group Center covered over 600 km toward Moscow, overrunning gun positions faster than crews could retreat with their multi-tonon pieces.

 The 152 mm ML20 howitzer weighed over 7 tons in transport configuration. When entire armies were encircled [music] at Viasma, at Kiev, at Smolinsk, recovery was impossible. Soviet planners needed a weapon requiring minimal precision manufacturing and maximum rapid deployment parameters that conventional artillery violated. But that rocket systems stripped of rifling and recoil mechanisms could satisfy.

 If you’re interested in how wars are actually decided by logistics, math, weapons, and doctrine, subscribe now and turn on notifications. Let’s continue. In August 1939, engineer Ike’s team test fired 162 millimeter rockets from rails mounted sideways on a ZIS-5 truck. The asymmetric thrust nearly toppled the vehicle.

 Three rockets veered 30° off target. The Reactive Scientific Research Institute had been tasked with adapting aircraft RS132 rockets for ground launch. The result could barely hit a factory complex. Victor Nikolai Galovski proposed the fix. Mount the rails longitudinally. Align thrust with the truck’s axial stability.

 The guides could be fabricated from standardized railroad track material already mass-produced across Soviet industry. No specialized manufacturing. A no precision machining. The resulting BM1316 prototype fired its full salvo without the chassis rotating off its wheelbase. The artillery branch was unimpressed. It caught us took up to 50 minutes [music] to load and fire 24 rounds.

 A conventional howitzer fired 95 to 150 in the same time. Accuracy was laughable. By June 1941, only 40 launchers existed. Then on June 21st, one day before the German invasion, Stalin authorized mass production launch rails fabricated from railroad track. Any factory that could weld steel could build one.

 At approximately 1,400 hours on July 14th, 1941, Captain Ivan Fleov’s experimental battery, 7B13 launchers, NKVD operated top secret, occupied firing positions in the Rudia Orchast. The target, a German supply concentration at a railway junction. Seven launchers, 112 rockets on under 10 seconds. 4,74 kg of high explosive hit the depot like a fist.

 Fuel trucks and ammunition stores detonated. Shrapnel cut through infantry and soft-skinned vehicles. German reports filed that evening used the word panic. The NKVD imposed absolute secrecy. Launchers carried only the marking K from the Vores common factory. Crews didn’t know the weapon’s designation. Soviet troops nicknamed it from the mysterious letter, drawing on Michael Sakovsk’s popular song Katusha about a girl longing for her beloved at the front.

 German soldiers coined their own name, Stalinorg, Stalin’s organ. A captured German corporal later offered a clinical summary. There were many cases of people becoming mad due to the Soviet rocket launcher fire. 3 months later, Fleerov’s battery [music] was encircled near Viasma. Following protocol, the crews fired all remaining rockets, destroyed every launcher, and fought to the last.

 Flyoff died, preventing the weapon from reaching German intelligence. For more detailed analysis on this topic, subscribe to the channel. Now, the Soviets had to build enough of them. A Kusha could be built in a workshop that manufactured farm equipment. No precision board barrels, no hardened steel forgings. Welders cut standard railroad track into launch rails and welded them onto truck beds.

 While Germany’s artillery required masters and weeks per gun, Katusha launchers were measured in days. By December 1941, 593 launchers built, 554 in service, eight regiments, 35 independent battalions. By December 1942, 3,237 launchers across 57 regiments, 216 batteries. of these 56% BM13 units, the 23% heavy M30 units, 21% lighter BM8 variants at Stalenrad.

 That November masked Katushia batteries saturated German positions during [music] Operation Uranus. In 1943, Lendle Studebaker US6 trucks became the standard platform. The red designated BM13N 1,800 built on American chassis alone. Guards mortar brigades formed. Then divisions by war’s end 518 batteries in service. Total production approximately 10,000 launchers.

 Germany’s answer was the Panzer 42. 10 Navalver tubes on a maltier halftrack. Total production 296. That’s it. 296 versus 10,000. Germany also fielded roughly 24,000 Toad Nebbleworfer launchers, but these lacked the Katyusha’s defining advantage, mobility. The Toad Nebblewarfer fired from a stationary position and waited for counter fire to find it.

 Or the Kusha fired and drove away. Germany even tried copying the design directly. The 8 cm Rakettan Vilfakver was a near clone of the smaller BM8, but German rockets left visible smoke trails that gave away launch positions. Soviet propellant produced no such trace and despite capturing intact cotushas, German engineers reportedly could not replicate the powder formulation.

 At 5:00 on April 16th, 1945, those production numbers arrived at the gates of Berlin. Three Soviet fronts assembled for the final offensive. 2.5 million men, 6,250 tanks, 41,600 artillery pieces and mortars, 3,255 truck mounted Katusha launchers, and 95,383 motor vehicles. They faced approximately 110,000 defenders of the German 9th Army at the CEO Heights, the last natural barrier [music] before the capital.

 The bombardment that morning combined Katushas with conventional artillery, approximately 9,000 guns and rocket launchers along an 18.5 m front, one artillery piece for every 11 ft. Roughly 500,000 shells and rockets in the first 30 minutes. For comparison, the Psalm’s opening barrage in 1916, previously the most intense in history, fired 174,000 shells over 24 [music] hours.

The Soviets delivered nearly three times that in half an hour. German General Hinri had anticipated the attack and pulled troops to the second line. The barrage struck mostly empty trenches. Even so, the CEO heights fell in 3 days. 3 weeks later, the weapon designed for open steps entered Berlin streets. Katusha launchers were dismantled and manhandled to rooftops to support attacks on defended buildings.

 Yet individual rockets were mounted on lengths of railroad track for close-range urban demolition. The rails aimed horizontally into apartment blocks. Every operational principle from 1941 was violated. The weapon born because the Red Army couldn’t replace 24,000 lost guns fast enough now bombarded the capital of the Reich itself.

 Here is the final arithmetic. A battery of four BM13 launchers fired a salvo in 7 to 10 seconds that delivered 4.35 tons of high explosive across a 400,000 square meter impact zone, equivalent to 72 howitzers firing simultaneously. Then it drove away. The Soviet Union built approximately 10,000 Kusha launchers.

 Germany’s self-propelled answer numbered 296. The Kusha couldn’t hit a specific target. It didn’t need to. It erased the grid square the target was standing in. Or after 1945, the Katusha didn’t retire. Its descendants, the BM21 Grad, the BM27 Uran, the BM30 Smurch are still in service today. The basic concept has been copied by dozens of nations.

 The Katusha saw action in Korea, Vietnam, the Yam Kipper War, the Iran Iraq war, Syria, Yemen. It is being fired somewhere in the world. As you watch this, Germany built the most precise artillery of the war. The Soviets built a truck with rails on it. They named her after a girl in a love song, and she buried the Verach.

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