Struggling to see the relevance, but, thank you for teaching me this: The U.S. Army is the permanent, professional standing land force (Regular Army, Reserves,

Struggling to see the relevance, but, thank you for teaching me this: The U.S. Army is the permanent, professional standing land force (Regular Army, Reserves, National Guard), while the Army of the United States (AUS) was a temporary, authorized component used primarily during major wars to rapidly expand forces through draftees and volunteers.