Fort Henry was built from 1832 to 1837 to replace an existing fortification from the War of 1812 era. Situated atop Point Henry, the Fort protected the naval dockyard at Point Frederick, the entrance of the Rideau Canal and the town of Kingston, which was the major transshipment point along the supply route between Montreal or Ottawa and all points west. The British Army garrisoned Fort Henry until 1870 when Queen Victoria's troops were pulled out of Canada. Soon after, "A" Battery, School of Gunnery, followed by "B" Battery, took up residence in the Fort and remained there until 1891. During World War I, Fort Henry was superficially repaired and used as an internment camp for political prisoners. Following the war, the Fort fell into complete disrepair. Fort Henry was restored from 1936 to 1938 as a joint Federal / Provincial make work project costing over $1 million. The Fort was opened as a museum and historic site "in the name of all British soldiers who served there" by Prime Minister Mackenzie King in August 1938. During World War II, Fort Henry became Camp 31, a Prisoner of War camp for enemy merchant seamen, soldiers, sailors and airmen. Reopened in 1948, Fort Henry has seen millions of visitors pass through its gates to watch the internationally acclaimed Fort Henry Guard perform.