キャッスル作戦
Operation Teapot was a series of fourteen nuclear test explosions conducted at the Nevada Test Site in the first half of 1955. It was preceded by "Operation Castle", and followed by "Operation Wigwam". "Wigwam" was, administratively, a part of "Teapot", but it is usually treated as a class of its own. The aims of the operation were to establish military tactics for ground forces on a nuclear battlefield and to improve the nuclear weapons used for strategic delivery.