United States Army

The United States Army, more popularly referred to as the Army, was a branch of the military of the United States of America on Earth. The largest branch of the various armed services of the United States, the Army was responsible for land based military operations. The Army was formed on June 14, 1775 as the Continental Army, and would later play a major role in securing the independence of the United States. George Washington was the leader of the Army at this time.

During the Civil War era, the Army was often called the Union Army. Colonel Thaddius Riker - a distant ancestor of Captain William T. Riker - served in the Union Army during the Civil War. His life was saved when a member of the Q continuum who would come to be called Quinn saved his life following the Battle of Pine Mountain, Georgia.

As aircraft were developed in the early 20th century, the Army initially took responsibility for aerospace matters. The particular part of the Army responsible for aerospace operations was known as the Army Air Corps. In 1947 that part of the Army was taken to form a separate armed service, known as the United States Air Force. (DS9 episode Little Green Men).

When the Hirogen captured the USS Voyager (NCC-74656), they forced the crew to participate in holodeck simulations in order to better understand the races of the United Federation of Planets - which they considered prey. During the simulation of Nazi occupied France, Chakotay assumed the role of an officer in the United States Army. (VOY episode The Killing Game Parts I & Part II).