The Army of the Potomac.
During the Civil War, the army based in Washington, D.C., was known as the Army of the Potomac. It was the primary Union army in the Eastern Theater and played a crucial role in major battles, including Gettysburg and Antietam. Commanded by various generals throughout the war, it was instrumental in the Union's efforts to defeat the Confederate forces.
The Washington based army was Pomonac
George Washington was commander-in-chief of the Continental army (Revolutionary War). The Confederate army fought for the South during the Civil War.
George Washington was the leader of the American Army during the revolution. The State of Washington did not exist during the Civil War but was technically, as a territory, part of the Union.
George Washington led the Union Army during the Civil War, before he became the first President
Washington's army was different sizes during the war because it was weird?
During the Civil War the South's formal army was called the Confederate States Army. It was active from 1861 until 1865.
The US Army during the revolution.
Delaware River.
Potomac
"Stonewall" Jackson
If you're referring to the entire US Army, that was Ulysses Grant during the American Civil War. George Washington commanded the Continental Army. Dwight Eisenhower was the Supreme Allied Commander in Europe.