The April-May 1641 timeframe saw determined infantry backed by artillery able to defeat German tank tanks. One of these was at Tobruk on 11 April 1941. Another was the defence of Thermopylae. The third was again at Tobruk on 1 May. The Germans considered that 12 of the tanks knocked out at Thermopylae were total losses. Many more were disabled but were repaired. The Germans were already masters at recovering and repairing knocked out tanks. The British had yet to learn the skill. German records show the attack against the New Zealanders was made by 18 tanks, including four Pzkw IV's armed with short 75mm guns. The tanks were crewed by 70 men, of whom 7 were killed and 22 wounded. This is based on the account in Vol.II of the Australian Official History."