he SO-152 (Russian: СО-152) is a Soviet 152.4 mm self-propelled gun developed in 1968, as a response to the American 155 mm M109 howitzer. Development began in 1967, according to the Resolution of the Council of Ministers of the Soviet Union from July 4, 1967. In 1968, the SO-152 was completed and in 1971 entered service. Its GRAU designation is 2S3 (2С3). The fighting vehicle also received the added designation Akatsiya (Акация), which is Russian for Acacia.