Soviet Army, the ZSU-57-2 was completely replaced by ZSU-23-4s by the early 1970s. Most ZSU-57-2s were put into reserve storage while a few remained in service in tank training centres (as vehicles for driver training), until the end of the 1970s. Some were converted by army workshops into bulldozers. The last ZSU-57-2s were scrapped in the 1980s, while some dismantled vehicles were used as gunnery range targets. One is preserved in the Kubinka Tank Museum. Foreign service ZSU-57-2s were exported like other Soviet equipment. Five other Warsaw Pact members—Poland, East Germany, Hungary, Bulgaria and Romania—used it, as well as Cuba, Egypt, Iran, Iraq and Syria. North Vietnam and North Korea may have received theirs without payment. East Germany The first foreign operator of the ZSU-57-2 was East Germany as it received its first vehicles in September 1957. From 1957 to 1961 the National People's Army received 129 vehicles, eventually replacing them with ZSU-23-4s between 1967 and 1974. The ZSU-57-2 was completely gone from East German service by 1979. Some of the vehicles were converted into FAB 500U training vehicles for T-54 drivers and were passed on to the unified German state. Poland Poland received its 129 ZSU-57-2s between 1957 and 1961. They were also offered a production license for twin S-68 AA autocannons, but declined it. Eventually, Poland replaced all its ZSU-57-2s with ZSU-23-4s. Seven Polish ZSU-57-2s are preserved, one at the Lubuskie Military Museum in Drzonów, one in Wicko Morskie, the largest anti-aircraft artillery firing range in Poland, one at the Land Forces Museum in Warsaw, one at the History and Tradition of Suvalkai Soldiers Museum in Suwalszczyzna, one in Koszalin and two at the Polish Army Museum in Warsaw. Other Warsaw Pact countries Three other Warsaw Pact members, Hungary, Bulgaria and Romania, received ZSU-57-2s once the ZSU-23-4 was introduced in the Soviet Army. Czechoslovakia imported one ZSU-57-2 for testing but it was rejected when it was realised that the domestically produced M53/59 Praga was comparable to the ZSU-57-2. Former Yugoslavia The Socialist Federal Republic of Yugoslavia ordered 100 ZSU-57-2s in 1963. Deliveries were completed between 1963 and 1964. They were passed on to the successor states during the 1992 breakup of the federal state. They were then used by the Federal Republic of Yugoslavia. There were 54 of those vehicles in service as of 1999, but this number decreased to 36 in the subsequent decade; they were withdrawn