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 89 I-Go medium tank
The was a medium tank used by the Imperial Japanese Army from 1932 to 1942 in combat operations of the Second Sino-Japanese War, at Khalkhin Gol against the Soviet Union, and in the Second World War. The Type 89B model was the world's first mass-produced diesel engine tank. The tank was armed with a short-barrel 57 mm cannon for knocking out pillboxes and masonry fortifications, and proved effective in campaigns in Manchuria and China, as the Chinese National Revolutionary Army had only three tank battalions to oppose them, which consisted primarily of Vickers export models, German Panzer Is, and Italian CV33 tankettes. The Type 89 was a 1920s design medium tank, built to support the infantry, and thus lacked the armor or armament of 1940s generation Allied armor; it was regarded as obsolete by the time of the 1939 battles of Khalkhin Gol, against the Soviet Union. The code designation "I-Go" comes from the "katakana" letter [イ] for “first” and the "kanji" [号] for "number". The designation is also transliterated Chi-Ro and sometimes "Yi-Go".
The Type 89 evolved from Japan's first domestic tank project initiated by the Imperial Japanese Army's Osaka Technical Arsenal in 1925. The original plan was for two types of tanks to be created. A light tank at 10-ton based on the French Renault FT tank and a 20-ton design modeled after the Vickers Medium tank. By February 1927, the Type 87 Chi-I medium tank was ready for trials. However, it was 20-ton and under-powered. The weight of the initial prototype and its low speed did not impress the Imperial Japanese Army General Staff Office, and a new requirement was issued for a lighter tank, with a nominal weight. The new design was modeled after the Vickers Medium C which had been bought by the Japanese Army in March 1927.