The Continental Army consisted of troops from all 13 colonies. When the American Revolutionary War began at the Battles of Lexington and Concord in April 1775, the revolutionaries in the 展开

War of 1812
The War of 1812, the second and last American war against the British, was less successful than the … 展开

On 11 September 2001, 53 Army civilians (47 employees and six contractors) and 22 soldiers were among the 125 victims killed in the Pentagon in a terrorist attack when American Airlines Flight 77 commandeered by five Al-Qaeda hijackers slammed into the western … 展开

• Military history of the United States
• Social history of soldiers and veterans in the United States
• List of military weapons of the United States
• Organizations which deal with US Army History 展开

In 1783, at the conclusion of the Revolutionary War, a Congressional committee under Alexander Hamilton sought opinions on a … 展开

Chief of Staff
Elihu Root was United States Secretary of War under presidents William McKinley and Theodore Roosevelt, 1899–1904. He reformed the organization of the War Department. He enlarged West Point and established the 展开

• 1775–1783: 17,000 (Continental Army without militias)
• 1784: 700 (First American Regiment)
• 1793: 5,100 ( 展开