9th U.S. Infantry

9th Infantry Regiment
Coat of arms
Active	1855–2015
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
Motto(s)	Keep Up The Fire!
Engagements	War of 1812 {1st Battalion} Mexican War Pig War Indian Wars War with Spain China Relief Expedition Philippine Insurrection World War I World War II Korean War Heartbreak Ridge Pork Chop Hill Vietnam Operation Golden Pheasant Armed Forces Expeditions – Panama Iraq Campaign Afghan Campaign
Commanders
Notable commanders	George Wright Emerson H. Liscum Charles A. Coolidge Huba Wass de Czege Jones M. Withers
Insignia
Distinctive unit insignia

War of 1812 {1st Battalion}
Mexican War
Pig War
Indian Wars
War with Spain
China Relief Expedition
Philippine Insurrection
World War I
World War II
Korean War

The 9th Infantry Regiment ("Manchu") is one of the oldest and most decorated active duty infantry units in the United States Army.

The 9th Infantry Regiment is one of the first units authorized in the United States Army. It first appeared as a result of the Act of 16 July 1798, that authorized twelve additional regiments of infantry, in January 1799. Josiah Carville Hall, of Maryland, was its lieutenant colonel. All of the officers were appointed from Maryland, and the regiment was recruited in that state. However it was disbanded 15 June 1800. It appeared again serving in the War of 1812, it was again organized in March 1812, with Simon Learned, of Massachusetts, as colonel. The regiment was raised in Massachusetts, and took part in the war on the northern border, being present at the Battle of Lundy's Lane, and other actions in that area. Following the war in the reorganization of the army, this regiment was again disbanded.

As a result of the Mexican–American War, in April 1847, the 9th Infantry was again organized, as one of the ten one-year regiments authorized by the Act of 11 February 1847. It was recruited primarily from the six New England states. It was briefly commanded by Colonel (and future President of the United States) Franklin Pierce before Pierce was promoted to brigadier general and commander of the brigade that included the 9th Regiment. Pierce was succeeded by Colonel Truman B. Ransom, who was killed in the assault upon Chapultepec Castle. Ransom was succeeded by Colonel Jones M. Withers, who resigned 23 May 1848, and he was succeeded by Colonel Henry L. Webb.