Historian and author Jayne Triber draws on her research and experiences working at Fort Independence on Castle Island in South Boston and at the Boston Harbor Islands national park area to review the dramatic, colorful, and military history of these hidden treasures. For over 350 years, the Boston Harbor Islands have played an important role in the defense of Boston, Massachusetts and the United States. From the colonial period to the Cold War, the Harbor Islands have been the site of fortifications, training camps, prisoner-of-war camps, and Nike missile installations.