103rd Infantry Regiment (United States)

103rd Infantry Regiment (2nd Maine)
Coat of arms
Active	1861–63 1916–19 1922-45 1946-59
Country	United States
Allegiance	New England; Maine, New Hampshire, Vermont, Massachusetts, and Rhode Island.
Branch	Army National Guard
Type	Infantry
Motto(s)	To the Last Man
Colors	Blue, gold, and white.
Engagements	American Civil War First Battle of Bull Run Peninsula Campaign Battle of 2nd Bull Run Battle of Antietam Battle of Fredericksburg Battle of Chancellorsville World War I Champagne-Marne Aisne-Marne Battle of Saint-Mihiel Meuse-Argonne Offensive World War II Battle of Guadalcanal New Georgia Campaign New Guinea Luzon
Commanders
Notable commanders	Charles Davis Jameson, Charles W. Roberts
Insignia
Distinctive unit insignia

The 103rd Infantry Regiment was an infantry regiment of the United States Army that served in combat in the American Civil War, World War I, and World War II. It was an Army National Guard regiment from the states making up New England, but most of its soldiers came from Maine. It was a part of the 26th Infantry Division and the 43rd Infantry Division. During the Cold War, the regiment was converted into an armored regiment, and its lineage is presently perpetuated by an engineer battalion in the Maine Army National Guard.