the united states army is a branch (or section) of the united states armed forces. An army mainly deals with land based missions, while other parts of the military deal with. the military forces of the united states, collectively known as the united states armed forces, the united states army (abbreviated usa stylised as u. s. a. Military is the third largest military in the world in terms of number of personnel. It draws its manpower from a large pool of paid volunteers;
