During World War II, most of the Top End was placed under military government. This is the only time since Federation that part of an Australian state or territory has been under military control. After the war, control for the entire area was handed back to the Commonwealth. The Bombing of Darwin occurred on 19 February 1942. It was the largest single attack ever mounted by a foreign power on Australia. Evidence of Darwin's World War II history is found at a variety of preserved sites in and around the city, including ammunition bunkers, airstrips, oil tunnels and museums. The port was damaged in the 1942 Japanese air raids. It was subsequently restored.