138th Infantry Regiment (United States)

138th Infantry Regiment
138th Infantry Regiment
	Coat of arms
Active	1832-1974; 2010-present
Country	United States
Branch	Missouri Army National Guard
Type	Light Infantry
Size	Regiment
Nickname	First Missouri
Motto	St. Louis' Own
Engagements	Mexican-American War Battle of Embudo Pass; Siege of Pueblo De Taos; Battle of Sacramento (Mexico); ; American Civil War Battle of Pea Ridge; Battle of Shiloh; Second Battle of Corinth; Battle of Iuka; Battle of Champion Hill; Battle of Big Black River Bridge; Siege of Vicksburg; Battle of Kennesaw Mountain; Battle of Atlanta; Battle of Ezra Church; Battle of Jonesborough; Battle of Franklin; Battle of Nashville; Battle of Fort Blakeley; ; Mexican Punitive Expedition; World War I Battle of Saint-Mihiel; Alsace–Lorraine; Meuse-Argonne Offensive; ; World War II Louisiana Maneuvers; Pacific Theatre Aleutian Islands Campaign; ; ; Operation Spartan Shield; Operation Inherent Resolve; Mexican Border Service Operation Lone Star; Operation Faithful Patriot; ;
Decorations	Meritorious Unit Commendation Governor's Unit Citation
Commanders
1st BN-138th IN REGT	LTC Timothy (TJ) Halls
3rd BN-138th IN REGT	LTC Miciah Pyatt
Insignia
Distinctive unit insignia

The 138th Infantry Regiment is a light infantry regiment of the United States Army and the Missouri National Guard.

There are currently two battalions within the 138th Infantry Regiment:

The 1st Battalion, 138th Infantry Regiment, headquartered at Jefferson Barracks, is a light infantry battalion assigned to the 39th Infantry Brigade Combat Team, subordinate to the 35th Infantry Division.

The 3rd Battalion, 138th Infantry Regiment, headquartered in Kansas City, Missouri, is a light infantry battalion assigned to the 72nd Infantry Brigade Combat Team (United States), subordinate to the 36th Infantry Division. As of 2024, the unit wears the 110th Maneuver Enhancement Brigade's patch until the official alignment is completed.