Panzer VIII Maus
Panzerkampfwagen VIII Maus ("Mouse") was a German World War II super-heavy tank completed in late 1944. It is the heaviest fully enclosed armoured fighting vehicle ever built. Five were ordered, but only two hulls and one turret were completed before the testing grounds were captured by advancing Soviet military forces.
Type 95 Ha-Go light tank
America's first tank versus tank battle of World War II occurred when Type 95 light tanks of the IJA 4th Tank Regiment engaged a US Army tank platoon, consisting of five brand new M3 Stuart light tanks from "B" company, 192nd Tank Battalion, on 22 December 1941, north of Damortis during the retreat to the Bataan Peninsula in 1941. Both the M3 and Type 95 light tanks were armed with a 37 mm gun, but the M3 was better armored, with 32 mm (1¼ inches) thick turret sides, vs the Type 95's 12 mm thick armor; however, as the US Army's Ballistics Research Lab (BRL) found after conducting the first large study of tank vs tank warfare in 1945, the most important factor in a tank duel was which side spotted the enemy first, fired first, and hit first. In this first engagement the IJA reacted first, destroying the lead M3 as it tried to leave the road. The four remaining American tanks all suffered hits as they retreated.