Fort Mckinley Maine. Web fort mckinley museum information. Web fort mckinley is a former united states army coastal defense fort on great diamond island, maine in casco bay, which operated from 1873 to 1947.
Web fort mckinley is a former united states army coastal defense fort on great diamond island, maine in casco bay, which operated from 1873 to 1947. Web fort mckinley is a former united states army coastal defense fort on great diamond island, maine in casco bay, which operated from 1873 to 1947. Web fort mckinley is a former united states army coastal defense fort on great diamond island, maine in casco bay, which operated from 1873 to 1947.it was named for.