The fort was declared a National Monument in 1924 and after 251 years of continuous military possession, the fort was deactivated in 1933 and the site was turned over to the United States National Park Service.
The fort was declared a National Monument in 1924. The fort was deactivated in 1933. This was after 251 years of continuous military possession. The site was turned over to the United States National Park Service. This was after 251 years of continuous military possession.