 Constructed between 1898 and 1920, Fort Worden was one of the largest Endicott Period (1890-1910) forts to be built and a rare example of a post built according to the precepts of the Endicott Board on land not already occupied by an existing fortification.It was located within sight of a potential (if unlikely) enemy fortification, a British Royal Navy installation on Vancouver Island in Canada.The fort was designated a National Historic Landmark in 1976.