FT HENRY, TN—A joint Union Army and Navy expedition captures Fort Henry along the Tennessee River, as Confederate General Lloyd Tilghman surrenders to Flag Officer Andrew H. Foote. The rising waters of the Tennessee condemned several of the defensive batteries, leaving it vulnerable to enemy fire. 

LONDON, UNITED KINGDOM—Queen Victoria ends all export restrictions on munitions from Great Britain, opening up the market for both sides to import British gunpowder and firearms. 

HAMPTON ROADS, VA—Flag Officer David Farragut's flagship, the U.S.S. Hartford, leaves Hampton Roads for Ship Island, Mississippi. Farragut, assigned to command the Western Gulf Blockading Squadron, would lead a campaign to capture New Orleans in April. 

BROOKLYN, NY—The USS Monitor, the first American ironclad, is launched from the Greenpoint shipyards in Brooklyn. 

WASHINGTON, DC—President Lincoln, in a desperate move to motivate General McClellan, orders General War Order No. 1, stating that all naval and land units would attack Confederate insurgents by February 1862. 

NANCY, KY—Union forces in Kentucky secure a critical victory as they repel Confederate attacks at the Battle of Mill Springs. Led by Brig. General George H. Thomas, Federal soldiers forced the Confederates to retreat south of the Cumberland River, securing southern Kentucky. 

ROMNEY, VA—Stonewall Jackson postpones a planned attack on Cumberland, Maryland because of fatigue and poor health among his men. Many of Jackson's units were operating at below half strength, making an attack against a critical B&O Railroad terminus impossible. 

WASHINGTON, DC—United States Senate confirms Edwin Stanton as President Lincoln's second Secretary of War. 

HATTERAS INLET, NC—Union forces led by General Ambrose Burnside arrives in North Carolina and begins planning an amphibious assault on Roanoke Island. 

WASHINGTON, DC—Secretary of War Simon Cameron resigns amid numerous allegations of corruptions. A former Pennsylvania Senator, Cameron was later appointed to be the Minister to Russia.