January 1862 - The Maryland General Assembly ratifies The Corwin Amendment.
January 19, 1862 - Battle of Mill Springs (or Fishing Creek, Logan’s Crossroads (Kentucky)
January 27, 1862 - President Lincoln issues General War Order #1 – Ordering U.S. naval and land forces to advance by February 22.
February 6, 1862 - Battle of Fort Henry (Tennessee).
February 8, 1862 - Battle of Roanoke Island (North Carolina)
February 12-16, 1862 - Battle of Fort Donelson (Tennessee).
February 16, 1862 - Fort Donelson surrenders to General Grant.
February 17, 1862 - 5th (final) Session, Provisional Confederate Congress, adjourns.
February 18, 1862 - 1st Session, 1st Confederate Congress, convenes.
February 20, 1862 - President Lincoln’s son Willie dies in the White House.
February 21, 1862 - Battle of Valverde (New Mexico Territory)
February 22, 1862 - Jefferson Davis is inaugurated as the regular President of the Confederate States of America and issues his Second Inaugural Address.
March 1862 - The Peninsula Campaign begins and President Lincoln relieves General McClellan as General-in-Chief.
March 6-8, 1862 - Battle of Pea Ridge (Arkansas)
March 8, 1862 - CSN Virginia sinks two wooden Union ships.
March 9, 1862 - Ironclad Monitor battles the Virginia to a draw.
March 14, 1862 - Capture of New Madrid, Missouri and New Bern, North Carolina, by Union.
March 23, 1862 - Battle of Kernstown (Virginia)
March 26, 1862 - Battle of Apache Canyon (New Mexico Territory)
March 28, 1862 - Battle of Glorieta (or Pigeon’s Ranch) (New Mexico Territory).
April 5, 1862 - Siege of Yorktown, Virginia begins.
April 6-7, 1862 - Battle of Shiloh won by General Grant.
April 7, 1862 - Island #10 (Missouri) falls to Union.
April 11, 1862 - Fort Pulaski (Georgia) captured by Union.
April 18-24, 1862 - Bombardment of Forts Jackson & St. Philip, Louisiana.
April 21, 1862 - 1st Session, 1st Confederate Congress, adjourns.
April 24, 1862 - Federal naval forces pass Forts Jackson and St. Philip below New Orleans.
April 25, 1862 - Fort Macon, North Carolina, captured.
April 25, 1862 - New Orleans surrenders to Flag Officer David Farragut.
May 4, 1862 - Yorktown evacuated followed by Union occupation.
May 5, 1862 - Battle of Williamsburg (Virginia)
May 8, 1862 - Battle of McDowell (Western Virginia)
May 9, 1862 - General David Hunter issues General Order No. 11 freeing the slaves in the Department of the South.
May 10, 1862 - Norfolk, Virginia, occupied by Union.
May 10, 1862 - Battle of Plum Bend (Tennessee)
May 15, 1862 - Battle of Drewry’s Bluff (Virginia)
May 15, 1862 - General Butler issues General Order #28
May 19, 1862 - President Lincoln repudiates Hunter's General Order No. 11 with a Proclamation.
May 20, 1862 - President Lincoln signs the Homestead Act into law.
May 23, 1862 - Battle of Front Royal (Virginia)
May 25, 1862 - Battle of 1st Winchester (Virginia)
May 30, 1862 - Corinth, Mississippi, taken by Union.
May 31- June 1, 1862 - Battle of Seven Pines (or Fair Oaks) (Virginia) – General Johnston severely wounded.
June 1, 1862 - General Robert E. Lee assumes command of the Army of Northern Virginia.
June 5, 1862 - Fort Pillow, Tennessee abandoned by Confederates.
June 6, 1862 - Battle of Memphis (Tennessee)
June 8, 1862 - Battle of Cross Keys (Virginia)
June 9, 1862 - Battle of Port Republic (Virginia)
June 11, 1862 - Lord Palmerston, the Prime Minister of Great Britain, sends an unprecedented letter to Charles Francis Adams Sr., telling of his destain of General Butler's General Order #28.
June 16, 1862 - Battle of Secessionville (South Carolina)
June 25 – July 1, 1862 - The Seven Days Battle forces General McClellan’s withdrawal towards Washington City.
July 1862 - Congress passes the Militia Act; authorizing President Lincoln to use black soldiers only as scouts, laborers, spies, kitchen workers, and nurses until after the Emancipation Proclamation. Until 1864, black soldiers are paid only half of what white soldiers are paid.
July 11, 1862 - President Lincoln appoints General Henry Halleck as General-in-Chief.
July 17, 1862 - Passes the Confiscation Act of 1862 and the 2nd Session, 37th Congress, adjourns.
August 5, 1862 - Battle of Baton Rouge (Louisiana)
August 9, 1862 - Battle of Cedar (or Slaughter) Mountain (Virginia)
August 17-September 23, 1862 - Sioux uprising in Minnesota
August 18, 1862 - 2nd Session, 1st Confederate Congress, convenes.
August 19, 1862 - Horace Greeley publishes "A Prayer of the Twenty Millions" in his New York Times.
August 22, 1862 - President Lincoln issues the "Greeley Letter" in response to Greeley’s "Prayer"
August 29-30, 1862 - Second Battle of Bull Run and the defeat of General John Pope. President Lincoln relieves General Pope.
August 30, 1862 - Battle of Richmond (Kentucky)
September 1, 1862 - Battle of Chantilly (Virginia)
September 4-9, 1862 - General Robert E. Lee invades the North and heads for Harpers Ferry.
September 17, 1862 - Battle of Antietam, Maryland the bloodiest battle of the Civil War. General Lee’s invasion of the North is halted, and rebels retreat to Virginia. Though the battle is essentially a draw, the battle revives flagging Northern hopes.
September 22, 1862 - Preliminary Emancipation Proclamation revealed by Lincoln.
September 24, 1862 - President Lincoln Suspends Habeas Corpus.
November 7, 1862 - President Lincoln replaces General McClellan with General Ambrose Burnside.