As a secondary theatre Norway also saw the surrender of the last Panzer III equipped unit, Panzerbrigade “Norwegen” on. All four of the early versions of the Panzer III had been withdrawn from the front line in February 1940, but the Ausf D was the least unsatisfactory of them. In theory there were meant to be eight Panzer IIIs in each light tank company, but some divisions had none.Ī smaller number of Panzer III Ausf Ds took part in the invasion of Norway, fighting with Pz Abt z b V 40 (Tank Detachment for Special Employment 40). As a result little can be said about the impact of the Panzer III. This compares to 1,445 Panzer Is, 1,223 Panzer IIs and 211 Panzer IVs. Only 98 Panzer IIIs were available for the invasion of Poland. The turret was an enlarged version of the one used on the Panzer II, now carrying three of the crew of five (commander, gunner and loader), an arrangement that dramatically improved the fighting power of the tank by increasing the rate of fire and allowing each member of the crew to concentrate on one job. The Panzer III was laid out in the same way as the earlier Panzer I and II, with the engine at the rear and the gearbox at the front. The situation had somewhat changed by the start of the campaign in the west in May 1940, by which time there were over 300 Panzer IIIs on the front line, but it would only be available in really large numbers for the start of the invasion of Russian in the summer of 1941. On 1 September 1939 only 98 had been completed (compared to 211 Panzer IVs, 1,223 Panzer IIs and nearly 1,500 Panzer Is). The development and production of the Panzer III progressed very slowly. This tank would be the main anti-tank weapon, firing armour piercing shot from its 3.7cm gun, while the Panzer IV would be the close support tank, firing high explosive shells at soft-shelled vehicles or anti-tank guns. Serious work on the Panzer III began in 1936, when a number of German tank manufacturers produced prototypes for a tank in the 15 ton category. Until then the Panzer III had been the only German designed tank armed with a gun designed to penetrate enemy armour. The Panzer III Medium Tank was the main German battle tank for the first two and a half years of the Second World War, only beginning to lose that status after the appearance of the Panzer IV Ausf F2 in March 1942.