British nuclear tests at Maralinga were conducted between 1956 and 1963 at the Maralinga site, part of the Woomera Prohibited Area in South Australia about north west of Adelaide. A total of seven nuclear tests were performed, with approximate yields ranging from . Two major test series were conducted at the Maralinga site: Operation Buffalo in 1956 and Operation Antler the following year. Operation Buffalo consisted of four tests; One Tree () and Breakaway () were detonated on towers, Marcoo () at ground level, and the Kite () was released by a Royal Air Force (RAF) Vickers Valiant bomber from a height of . This was the first drop of a British nuclear weapon from an aircraft.