German encounter of Soviet T-34 and KV tanks
Prior to the invasion of the Soviet Union during World War II, the German armed forces were not aware of two newly developed Soviet tanks, the T-34 and the KV. As a result, they were surprised when they met them in combat for the first time in June 1941. The German's standard anti-tank weapons were found to be ineffective against these new Soviet vehicles. This experience prompted a notable leap in tank development in Nazi Germany, mainly in an effort to counter these new threats.
At the beginning of Operation Barbarossa, the Germans were expecting little from their opponent's tank forces, which were composed of the old T-26 and BTs. While most of the Soviet Union's armoured forces were composed of such tanks, the T-34 and the KV designs, which were previously unknown, took the Germans by surprise. Both types were encountered on the second day of the invasion – 23 June 1941.
Half a dozen anti-tank guns fire shells at him [a T-34], which sound like a drumroll. But he drives staunchly through our line like an impregnable prehistoric monster... It is remarkable that lieutenant Steup's tank made hits on a T-34, once at about 20 meters and four times at 50 meters, with Panzergranate 40 (caliber 5 cm),[nb 1] without any noticeable effect.
— German battle report, Finkel 
The KV tanks were usually assigned to the same units as the more numerous T-34 and, although they were much larger in size, their overall performance was quite similar; many sources discuss the impact of both types. The most common model of KV was the KV-1. It was in the Battle of Raseiniai where German forces encountered the Soviet KV for the first time. The Soviet 2nd Tank Division from the 3rd Mechanized Corps attacked and overran elements of the German 6th Panzer Division near Skaudvilė on 23 June. German Panzer 35(t) light tanks and anti-tank weapons were practically ineffective against the Soviet armoured giants, which closed with and, even though some of them were out of ammunition, destroyed some German anti-tank guns by simply driving over them.
An account by the Thuringian 1st Panzer Division describes this battle:
The KV-1 and KV-2, which we first met here, were really something! Our companies opened fire at about 800 yards, but [they] remained ineffective. We moved closer and closer to the enemy, who for his part continued to approach us unconcerned. Very soon we were facing each other at 50 to 100 yards. A fantastic exchange of fire took place without any visible German success. The Russian tanks continued to advance, and all armour-piercing shells simply bounced off them. Thus we were presently faced with the alarming situation of the Russian tanks driving through the ranks of 1st Panzer Regiment towards our own infantry and our hinterland. Our Panzer Regiment therefore about turned and rumbled back with the KV-1s and KV-2s roughly in line with them. In the course of that operation we succeeded in immobilizing some of them with special purpose shells at very close range - 30 to 60 yards. A counter attack was launched and the Russians were thrown back. A protective front established and defensive fighting continued.
— Paul Carrell, Hitler Moves East 
The next day, at a crossroads near Raseiniai, a single KV heavy tank managed to block the advance of elements of the 6th Panzer Division, which had established bridgeheads on the Dubysa. It stalled the German advance for a full day while being attacked by a variety of anti-tank weapons before being overrun after it finally ran out of ammunition.
Tank versus tank engagements
Historians initially believed that the new tanks were "scattered" among the army in small numbers, but recent research shows the exact opposite. The new tanks had been produced in large numbers and concentrated into a dedicated type of formation, i.e. a mechanized corps.
|Soviet corps||Soviet divisions||Total Soviet tanks||T-34 and KV|
|6th Mechanized Corps||4th, 7th, 29th||1,131||452[nb 2]|
|4th Mechanized Corps||8th, 32nd, 81st||979||414|
|8th Mechanized Corps||12th, 34th, 7th||899||171|
|15th Mechanized Corps||10th, 37th, 212th||749||136|
|3rd Mechanized Corps||2nd, 5th, 84th||672||110|
|7th Mechanized Corps||14th, 18th, 1st||959||103|
|16th Mechanized Corps||15th, 39th, 240th||478||76|
|2nd Mechanized Corps||11th, 16th, 15th||527||60|
|22nd Mechanized Corps||19th, 41st, 215th||712||31|
|11th Mechanized Corps||29th, 33rd, 204th||414||20|
|5th Mechanized Corps||13th, 17th, 109th||1,070||17|
|German corps||German divisions||Total German tanks[nb 3]||Tanks with 37 mm gun
(incl. Panzer 38(t) and Panzer III)
|Tanks with 50 mm or larger gun
(incl. Panzer III and Panzer IV)
|XXXXI Panzer Corps||1st, 6th||390||155||121|
|LVI Panzer Corps||8th||212||118||30|
|XXXIX. Armeekorps mot||7th, 20th||494||288||61|
|LVII Panzer Corps||12th, 19th||448||219||60|
|XXXXVII Panzer Corps||17th, 18th||420||99||187|
|XXXXVI Panzer Corps||10th||182||0||125|
|XXIV Panzer Corps||3rd, 4th||392||60||207|
|III Panzer Corps||13th, 14th||296||42||140|
|XXXXVIII Panzer Corps||11th, 16th||289||47||135|
|XIV Panzer Corps||9th||143||11||80|
|Any other unit of Army Group North, Centre, or South||0||0||0|
Among the mechanized corps (MC), four formations were especially well equipped. On the day of German invasion, about 70% of the total T-34 and KV tanks produced at that time were deployed in the 4th, 6th, 8th, and 15th MC. The 6th MC operated in the Białystok area, and all of the others in the Soviet Ukraine. All of their engagements with German tanks happened during or just before the Battle of Brody:
- The 15th MC destroyed 43 German tanks for the loss of 13 KVs, six T-34s and 32 BTs from 22 to 26 June 1941;
- The 8th MC lost up to 95% of its tanks in fierce fighting in the Dubno area between 26 June and 1 July 1941.[nb 4]
Tank-to-tank battles were rare at the beginning of Operation Barbarossa as the Germans did not seek them; they preferred to bypass the Soviet armour whenever possible. The two stand-out formations, the 4th and 6th MCs, lost almost all of their T-34 and KVs during movement, not from any German attack. Both corps tried to assemble counterattacks against German infantry (not against panzers), but the counterattacks had no impact and were barely noticeable. The same pertained to the 15th MC after 26 June.
In the first two weeks of the invasion, the Soviet Union suffered the loss of most of its T-34s and KVs, as well as the loss of most of the older tanks:
- By 12 July 1941, the 4th MC had 45 new vehicles out of the original 414.
- By 27 June, the 6th MC had ceased to exist, having lost all 450 new tanks.
- By 7 July, the 8th MC had 43 tanks (both old and new) out of an original 899.
- By 7 July, the 15th MC had 66 tanks (both old and new) out of an original 749.
On one hand, these corps had, within weeks, lost most of their T-34s and KVs, but on the other hand, German reports did not note such a massive elimination in combat.[nb 5] The number of non-combat losses was unprecedented.
German anti-tank capability
In the first weeks of the invasion, the main German anti-tank weapon was the 3.7 cm Pak 36 gun. The new 5 cm Pak 38 had just begun to enter service in small numbers, with a maximum of two weapons per infantry regiment. Both types were practically useless against the T-34. German tanks of the time used similar types of guns,[nb 6] which were ineffective against the armour of the new Soviet tanks. Generally, the T-34 clearly outclassed the existing Panzer III and Panzer IV medium tanks.
Attempts to destroy the T-34s and KVs concentrated on first immobilising them by firing at their tracks and then by tackling them with field artillery, anti-aircraft guns, or by blowing them up at close range by shaped charge grenades.
Impact on tank design worldwide
At the insistence of General Heinz Guderian, a special Panzerkommision arrived on the Eastern Front on 20 November 1941 to assess the T-34. To respond to the Soviet armoured threat, the Germans were forced to adopt new, heavier designs, such as the Panther and Tiger, which in turn forced upgrades to the Soviet, United States and British tank fleets.
- At the time, the 50 mm Panzergranate 40 mentioned in the report was the most effective anti-armour ammunition in German tank forces.
- On June 1 there were 114 KVs, 238 T-34s, but another 100 T-34s were received by June 22, 1941. The number is confirmed by the American author David M. Glantz.
- Total German tanks includes non-combat "commander tanks" as well as outdated Panzer I and Panzer IIs
- The exact proportion of combat to non-combat losses is not known. See Battle of Brody (1941) for description. Solonin, pp. 261–262.
- German reports mentioned small-scale encounters with these troublesome, unexpected tank types. They regarded the use of T-34s and KVs as "scattered".
- The 3.7 cm KwK 36 was a turret-mountable version of the standard 3.7 cm Pak 36 infantry gun. The short-barreled 7.5 cm KwK 37 (intended for infantry support against fortifications) and the new 5 cm KwK 38 had a worse anti-armour capability than the long-barreled towed 5 cm Pak 38.
- There were 967 T-34s and 508 KVs deployed: Erickson 1962/2001, p. 567.
- Zaloga 1995, p. 9.
- Handel 1989, p. 137
- Zaloga 1995, pp. 17–21
- Finkel 2011, 138-150
- Newton 2003, p. 13
- Newton, 2003, pp. 21-25
- Carrell 1964, pp. 23-24
- Zaloga 1995, pp 18–19.
- Newton, 2003, p. 33
- Stolfi 1993, p. 165
- Solonin 2007, p. 528–529
- Solonin 2007, pp. 99–100
- Glantz, David M (2010-12-30). Barbarossa Derailed: The Battle for Smolensk, 10 July-10 September 1941. p. 37. ISBN 9781906033729.
- Solonin, p. 379.
- Solonin, pp. 310–315.
- Solonin, pp. 261–262.
- Solonin, p. 321.
- Solonin, p. 145.
- Solonin, pp. 145, 261–262, 321.
- Buell et al 2002, pp. 120,147–149
- Forczyk 2007, p. 4
- Finkel, p. 147.
- Doyle & Jentz 1997, p. 4
- Buell, Thomas B; Bradley, John N; Griess, Thomas E; Dice, Jack W; Bradley, John H (2002). The Second World War: Europe and the Mediterranean. Garden City Park (NY): Square One Publishers. ISBN 0-7570-0160-2.
- Carrell, Paul (1964). Hitler Moves East. Boston: Little, Brown. OCLC 405998.
- Doyle, Hilary; Jentz, Tom (1997). Panther Variants 1942-45. London: Osprey. ISBN 978-1-85532-476-3.
- Finkel, Meir (2011). On flexibility: recovery from technological and doctrinal surprise on the battlefield. Stanford, California: Stanford Security Studies. ISBN 978-0-8047-7489-5.
- Forczyk, Robert (2007). Panther vs T-34 : Ukraine 1943 (1 ed.). Oxford: Osprey. ISBN 1-84603-149-4.
- Glantz, David M. (2010). Barbarossa derailed : the battle for Smolensk, 10 July-10 September 1941. Solihull: Helion. ISBN 1-906033-72-2.
- Handel, Michael I. (1989). War, strategy, and intelligence (1. publ. ed.). London, England: F. Cass. ISBN 0-7146-3311-9.
- Newton, Steven H (2003). Panzer Operations on the Eastern Front- The Memoirs of General Raus 1941-1945. Da Capo Press. ISBN 0-306-81247-9.
- Solonin, Mark (2007). Tomasz Lisiecki, ed. 22 czerwca 1941 czyli Jak zaczęła się Wielka Wojna ojczyźniana (in Polish) (1 ed.). Poznań, Poland: Dom Wydawniczy Rebis. ISBN 978-83-7510-130-0. (the only English translations of Solonin's works seem to be, as of June 2011, these online chapters)
- Stolfi, R.H.S (1993). Hitler's panzers east: World War 2 reinterpreted. Norman: University of Oklahoma Press. ISBN 0-8061-2581-0.
- Zaloga, Steven; Kinnear, Jim; Sarson, Peter (1995). KV 1 & 2 HEAVY TANKS 1939-45. Oxford: Osprey Publishing. ISBN 1-85532-496-2.