Fort Mary was a British fort built in 1688 that saw action during Queen Anne's War and was located in Saco, Maine overlooking Winter Harbor / Biddeford Pool.[1] [2] The fort replaced Fort Saco (1708), which was built at Saco Falls during King William's War. The commander of the fort during King William's War was Captain John Hill.[3] The fort was attacked in the Northeast Coast Campaign (1703) and natives killed 11 English and took 24 prisoner.[4] Saco was raided again in 1704 and 1705.[5] [6] They overwhelmed the garrison in the fort at Winter Harbor (in present-day Biddeford near Biddeford Pool), forcing them to submit to terms of capitulation. Winter Harbor was raided two more times, in 1707 and 1710.[5] [7]