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ISU-152
ISU-152 was a Soviet multirole fully enclosed and armored assault gun or armored self-propelled gun, also capable of serving as a heavy tank destroyer developed and used during World War II, with a subsequent use, mainly in the Soviet military, until the 1970s.
==History==
The beginnings of the ISU-152 came on January 24, 1943, when the first prototype of the SU-152 was unveiled. It was designated Object 236 (Объект 236). Object 236 was completed in Factory No. 100 in Chelyabinsk, and on the same day, January 24, underwent trials on the Chebarkulski artillery range, 107 km from Chelyabinsk. By February 7, 1943 the trials were over, passed with success. On February 14 the vehicle was adopted and put into production under the KV-14 (КВ-14) designation. In April 1943 was ordered KV-14 to be henceforth designated SU-152 (СУ-152). In time, the combat performance of SU-152, based on the KV-1S tank, made necessary the modernisation of the vehicle, using the new IS tank as a base. On May 25, 1943, shortly after deployment, the administration of Factory No. 100 ordered the beginning of the modernisation of the SU-152, which included increased armour protection and other improvements. Development began in July 1943, under the supervision of Joseph Yakovlevich Kotin (the chief designer of Soviet heavy tanks) and G. N. Moskvin as the main designer, and in about a month the first modernized variant was ready. It was designated IS-152 (ИС-152). It underwent factory trials in September 1943, revealing a large number of different deficiencies, which sent it back for further improvement. In October 1943 a second (different) modernized variant was ready, designated Object 241 (Объект 241). It was an improvement over the IS-152. The factory trials began the same month, followed by state trials on the Gorohovetskom test range. On November 6, 1943, an order was issued for adoption of this variant, under the ISU-152 (ИСУ-152) designation, and in December production began at the Chelyabinsk Kirovsk Plant, replacing the SU-152.〔(【引用サイトリンク】title=Тяжёлая самоходная установка СУ-152 )〕〔(ИСУ-152 )〕
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