Army One

Army One is the radio call sign used by any United States Army aircraft carrying the President of the United States. The title is automatically applied regardless of the specific type of Army aircraft being used. Once the President disembarks, the aircraft reverts to its normal call sign. This is analogous to the call signs Air Force One (for U.S. Air Force aircraft), Marine One (for U.S. Marine Corps helicopters), Navy One (for U.S. Navy aircraft), and Coast Guard One (for U.S. Coast Guard aircraft) when the President is aboard.

The term "Army One" is far less frequently invoked in public discourse compared to "Air Force One" or "Marine One," primarily due to the infrequency with which the President travels aboard Army aircraft.