"In landing operations, retreat is impossible, to surrender is as ignoble as it is foolish. above all else remember that we as attackers have the initiative, we know exactly what we are going to do, while the enemy is ignorant of our intentions and can only parry our blows. We must retain this tremendous advantage by always attacking rapidly, ruthlessly, viciously, and without rest." - General George S. Patton, Jr.
The Type 89 medium tank I-Go (八九式中戦車 イ号 Hachikyū-shiki chū-sensha I-gō?) 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; and was regarded as obsolete by the time of the battles of Khalkhin Gol, against the Soviet Union, in 1939. The code designation "I-Go" comes from the katakana letter [イ] for “first” and the kanji [号] for “number”. The designation is sometimes transliterated “Yi-Go”.
Place of origin Empire of Japan
Weight 12.79 metric tons (14.10 short tons)
Length 5.73 m (18 ft 10 in)
Width 2.13 m (7 ft 0 in)
Height 2.56 m (8 ft 5 in)
Armor 6–17 mm (0.24–0.67 in)
armament 57 mm Type 90 gun
armament 2 x 6.5 mm Type 91 machine gun
(hull, turret rear)
Engine Mitsubishi A6120VD 6-cylinder air-cooled petrol diesel
120 hp (90 kW)/ 1800 rpm 14,300cc
Suspension leaf spring
range 170 km (110 mi)
Speed 26 km/h (16 mph)