45th Illinois Infantry Regiment

45th Regiment Illinois Volunteer Infantry "Washburn Lead Mine Regiment"
Illinois state flag
Active	December 25, 1861, to July 12, 1865
Country	United States
Allegiance	Union
Branch	Infantry
Engagements	American Civil War Capture of Fort Henry Capture of Fort Donelson Battle of Shiloh Battle of Port Gibson Battle of Raymond Battle of Jackson Battle of Champion Hill Battle of Big Black River Bridge Siege of Vicksburg Battle of Resaca Battle of Kennesaw Mountain Siege of Atlanta Battle of Jonesboro March to the Sea Battle of Bentonville

The 45th Regiment Illinois Volunteer Infantry, the "Washburn Lead Mine Regiment", was an infantry regiment that served in the Union Army during the American Civil War. In response to President Lincoln's call for 75,000 volunteers, it was organized at Galena, Illinois. It participated in many of the leading campaigns in the Western Theater.