USS George Bancroft SSBN-643 was a 640-class Fleet Ballistic Missile submarine homeported in Charleston, South Carolina, and Kings Bay, Georgia. Built in Groton, Connecticut, the boat was launched 20 March 1965 and commissioned 22 January 1966. It completed 19 deterrent patrols with the Polaris A-3 missile, 27 deterrent patrols with the Poseidon missile, and 13 deterrent patrols with the Trident I missile. The boat was decommissioned 21 September 1993. Its crew earned two Meritorious Unit Commendations and four Battle Efficiency "E" awards.