The BTR-152 and BTR-40, the first two Soviet mass-produced APCs developed after the Second World War, gave the Soviet Army useful experience with wheeled armoured personnel carriers. However, even as they were designed, they weren't suited for the needs of the Soviet Army as they lacked a roof (which was added in later versions designated BTR-152K and BTR-40B respectively). The low combat values of theBTR-152 and BTR-40 were exposed when the Egyptian Army used them during the Suez Crisis. This was one of the reasons why the new APC was developed.
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