The Pejepscot Proprietors and the Massachusetts Bay Colony built the fort in around 1720 on the western bank of the Kennebec River in response to Indian raids which eventually led to Dummer's War.
[1] Named for Ludovic Stewart, 1st Duke of Richmond, the fort included a blockhouse, trading post, chapel, officers' and soldiers' quarters, all surrounded by a palisade.
[6][7] William Lithgow (judge) and Arthur Noble were also commanders of the fort by 1746.
On August 19, 1724, a militia of 208 soldiers departed Fort Richmond under command of captains Jeremiah Moulton and Johnson Harmon, traveled up the Kennebec in 17 whaleboats, and sacked Norridgewock, killing Sébastien Rale.
[10] In 1748, natives took Frances Noble captive close to Fort Richmond.