West Berlin was east and north of the Inner German border and only accessible by land from West Germany by narrow rail and highway corridors. It consisted of the American, British, and French occupation sectors established in 1945. The Berlin Wall, built in 1961, physically separated West Berlin from its East Berlin and East German surroundings until it fell in 1989. On 3 October 1990, the day Germany was officially reunified, East and West Berlin formally reunited, joined the Federal Republic as a city-state and, eventually, once again became the capital of Germany.