Commands, sometimes called units or formations, form the building blocks of a military.
A commander is normally specifically appointed to the role in order to provide a legal framework for the authority bestowed.
Within the United States Army, the acronym MACOM is used for Major Command.
[2] Within the United States Air Force (USAF), the acronym MAJCOM is used.
[3][4] There are several types of Major Commands in the United States Armed Forces: