The term overwatch originates in U.S. military doctrine.

Nevertheless, the current U.S. doctrine emphasizes the use of United States Army helicopters for close air support and anti-tank missions.

U.S. strategic doctrine agrees.

The U.S. doctrine for the use of nuclear weapons was revised most recently in the Nuclear Posture Review, released April 6, 2010.

The U.S. doctrine also includes the following assurance to other states:

U.S. armored doctrine in World War II saw the tank as a deep-attack or exploitation vehicle.

By the time it was ready for operations, however, U.S. military doctrine had been altered to remove the requirement for the use of transport gliders in combat.

The hoary idea that NATO might have to use nuclear arms against conventional attack lingers in U.S. doctrine.

U.S. doctrine originally called for the Hellcat to be held in reserves so that it could block an incoming armored thrust.

The force operates according to slightly modified United States Army practices, and uses U.S. doctrine.