United States Army – Military History Society of Rochester

The oldest (1775) and largest branch, responsible for land-based combat, securing territory, and maintaining order.

United States Army
Service Mark of the United States Army^[1] Wordmark^[2]
Founded	3 June 1784 (241 years, 10 months) (in current form) 14 June 1775 (250 years, 9 months) (as the Continental Army)^[3]
Country	United States
Type	Army
Role	Land warfare
Size	452,823 active duty personnel^[4] 328,084 Army National Guard personnel 170,601 Army Reserve personnel^[5] 946,961 total uniformed personnel (official data As of 30 June 2025^[update]) 223,382 civilian personnel^[6] 4,406 crewed aircraft^[7]
Part of	United States Armed Forces^[8] Department of the Army
Headquarters	The Pentagon Arlington County, Virginia, U.S.
Motto	"This We'll Defend"^[9]
Colors	Black, gold and white^[10]^[11]
March	"The Army Goes Rolling Along" Play^ⓘ
Mascot	Army Mules
Anniversaries	Army Birthday: 14 June^[12]
Equipment	List of U.S. Army equipment
Engagements	See list Revolutionary War War of 1812 Mexican–American War Civil War Indian Wars Spanish–American War China Relief Expedition Philippine–American War Mexican Expedition World War I Russian Civil War Bonus Army suppression World War II Korean War 1958 Lebanon crisis Vietnam War Dominican Civil War Korean DMZ Conflict Invasion of Grenada Invasion of Panama Somali Civil War Persian Gulf War Kosovo War Global war on terrorism War in Afghanistan Iraq War Operation Inherent Resolve^[13] Battle of Khasham
Website	army.mil goarmy.com
Commanders
Commander-in-Chief	President Donald Trump
Secretary of Defense	Pete Hegseth
Secretary of the Army	Daniel P. Driscoll
Chief of Staff	GEN Christopher LaNeve (acting)
Vice Chief of Staff	GEN Christopher LaNeve
Chief Warrant Officer of the Army	CW5 Aaron H. Anderson
Sergeant Major of the Army	SMA Michael Weimer^[14]
Insignia
Flag
Field flag^[a]
Logo