 Fort Richmond was dismantled in 1755 when Fort Shirley (named after William Shirley, also called Frankfort, located in present-day Dresden), Fort Western and Fort Halifax were built upriver.In 1754, Fort Halifax was built by order of the Massachusetts General Court on the peninsula at the confluence of the Sebasticook and Kennebec rivers.The fort was named for George Montagu-Dunk, 2nd Earl of Halifax, the British colonial secretary.