9th Infantry Regiment (United States)

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9th Infantry Regiment
Coat of arms
Active	1855–Present
Country	United States
Branch	United States Army
Type	Infantry
Role	Stryker Infantry
Size	1 battalion
Part of	4/9INF: 1SBCT 4ID
Garrison/HQ	4th Battalion: Fort Carson, Colorado
Nickname(s)	Manchu[1]
Motto(s)	Keep Up The Fire!
Engagements	War of 1812 Mexican War Pig War (1859) Indian Wars Spanish–American War Siege of Santiago China Relief Expedition Philippine–American War World War I World War II Korean War Battle of Heartbreak Ridge Battle of Pork Chop Hill Operation Paul Bunyan Vietnam Operation Golden Pheasant Operation Just Cause War on Terror Iraq Campaign Operation Enduring Freedom
Commanders
Notable commanders	Franklin Pierce George Wright Emerson H. Liscum Charles A. Coolidge Huba Wass de Czege Jones M. Withers Olinto M. Barsanti
Insignia
Distinctive unit insignia

The 9th Infantry Regiment ("Manchu"^[1]) is a parent infantry regiment of the United States Army.

Unrelated units designated the 9th Infantry Regiment were organized in the United States Army in 1798 during the Quasi-War, in 1812 during the war of 1812, and in 1847 during the Mexican–American War. The 1812 regiment fought in the Battle of Lundy's Lane, and the 1847 regiment in the Battle for Mexico City.

The lineage of the current regiment begins with the 1855 organization of the 9th Infantry Regiment, which was dispatched to the Pacific Northwest, where it served in the American Indian Wars. The regiment remained in the west during the American Civil War, garrisoning posts near San Francisco. After the end of the American Civil War the regiment continued its service through the final Indian Wars, then fought at the Battle of San Juan Hill during the Spanish–American War. During the Boxer Rebellion, the 9th Infantry was sent to China, where it earned the nickname Manchu. After the end of the rebellion the regiment saw duty in the Philippine–American War.

In 1917 the regiment became part of the 2nd Infantry Division, with which it served during World War I, World War II, and the Korean War. Reorganized as a parent regiment during the late 1950s as the United States Army adapted its organization to the Cold War, its 4th Battalion served with the 25th Infantry Division in the Vietnam War. The 9th's 1st, 2nd, and 3rd Battalions served in the 1989–1990 United States invasion of Panama, Operation Just Cause, with the 7th Infantry Division (Light). Its 1st and 4th Battalions fought in the Iraq War and 4th Battalion later fought in Operation Enduring Freedom in Afghanistan in 2012-2013. Detachments of 4th Battalion deployed again to Afghanistan in support of Operation Freedom’s Sentinel in 2018-2019 and to Iraq and Syria as part of Operation Inherent Resolve in 2021-2022. 4th Battalion is, as of February 2018^[update], the only remaining active battalion of the regiment, stationed at Fort Carson with the 1st Stryker Brigade Combat Team, 4th Infantry Division.