High Quality Content by WIKIPEDIA articles! SO-152 (СО-152) is a Soviet 152.4 mm self-propelled artillery developed in 1968. It was a response to the American 155 mm M109. The development started in 1967 according to the Resolution of the Council of Ministers of USSR 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 additional designation Akatsiya (Акация), which is Russian for acacia.