90th Illinois Infantry Regiment

90th Regiment Illinois Volunteer Infantry "The Irish Legion"
90th Regiment Illinois Volunteer Infantry "The Irish Legion"
	Illinois state flag
Active	September 7, 1862, to June 10, 1865
Country	United States
Allegiance	Union
Branch	Infantry
Engagements	Siege of Vicksburg; Battle of Missionary Ridge; Battle of Resaca; Battle of Kennesaw Mountain; Battle of Jonesborough; March to the Sea; Battle of Bentonville;

The 90th Regiment Illinois Volunteer Infantry was an infantry regiment that served in the Union Army during the American Civil War.