an Entity references as follows:
The 18 Forrest Sherman-class destroyers comprised the first post-war class of US destroyers. Commissioned beginning in 1955, these ships served until the late 1980s. Their weaponry underwent considerable modification during their years of service. Four were converted to guided-missile destroyers. This class also served as the basis for the Charles F. Adams-class guided-missile destroyers. Two ships of the class became museum ships, nine were sunk in training exercises, and the others were scrapped.