Question: A former United States Army fort in Cape Elizabeth, Maine which was part of the coastal defenses and redeveloped into an 90-acre park encompassing historical sites is most famous for what?
Sentence (from "Fort Williams (Maine)"): It was part of the Coast Defenses of Portland, later renamed the Harbor Defenses of Portland, a command which protected Portland's port and naval anchorage 1904-1950.
Relevant evidence: Yes