1864 events in history

Jan 21 The Tauranga Campaign begins during the Maori Wars
Feb 17 American Civil War: The H. L. Hunley becomes the first submarine to engage and sink a warship, the USS Housatonic
Feb 20 American Civil War: Battle of Olustee occurs – the largest battle fought in Florida during the war
Feb 27 American Civil War: The first Northern prisoners arrive at the Confederate prison at Andersonville, Georgia
Feb 29 American Civil War: Kilpatrick-Dahlgren Raid fails – plans to free 15,000 Union soldiers being held near Richmond, Virginia are thwarted
Mar 11 The Great Sheffield Flood kills 238 people in Sheffield, England
Mar 12 American Civil War: The Red River Campaign begins as a US Navy fleet of 13 Ironclads and 7 Gunboats and other support ships enter the Red River
Mar 15 American Civil War: The Red River Campaign : U.S. Navy fleet arrives at Alexandria, Louisiana
Mar 16 American Civil War: During the Red River Campaign, Union troops reach Alexandria, Louisiana
Apr 8 American Civil War: Battle of Mansfield – Union forces are thwarted by the Confederate army at Mansfield, Louisiana
Apr 10 Archduke Maximilian of Habsburg is proclaimed emperor of Mexico during the French intervention in Mexico
Apr 12 American Civil War: The Fort Pillow massacre: Confederate forces kill most of the African American soldiers that surrendered at Fort Pillow, Tennessee
Apr 17 American Civil War: The Battle of Plymouth begins – Confederate forces attack Plymouth, North Carolina
Apr 18 Battle of Dybbøl: A Prussian-Austrian army defeats Denmark and gains control of Schleswig. Denmark surrenders the province in the following peace settlement
Apr 22 The U.S. Congress passes the Coinage Act of 1864 that mandates that the inscription In God We Trust be placed on all coins minted as United States currency
Apr 25 American Civil War: The Battle of Marks' Mills
Apr 29 Theta Xi fraternity is founded at Rensselaer Polytechnic Institute, the only fraternity to be founded during the American Civil War
May 5 American Civil War: The Battle of the Wilderness begins in Spotsylvania County
May 7 The world's oldest surviving clipper ship, the City of Adelaide is launched by William Pile, Hay and Co. in Sunderland, England, for transporting passengers and goods between Britain and Australia
May 7 American Civil War: The Army of the Potomac, under General Ulysses S. Grant, breaks off from the Battle of the Wilderness and moves southwards
May 9 Second War of Schleswig: The Danish navy defeats the Austrian and Prussian fleets in the Battle of Heligoland
May 10 American Civil War: Colonel Emory Upton leads a 10-regiment "Attack-in-depth" assault against the Confederate works at The Battle of Spotsylvania, which, though ultimately unsuccessful, would provide the idea for the massive assault against the Bloody Angle on May 12. Upton is slightly wounded but is immediately promoted to Brigadier general
May 12 American Civil War: The Battle of Spotsylvania Court House: Thousands of Union and Confederate soldiers die in "the Bloody Angle"
May 13 American Civil War: Battle of Resaca – the battle begins with Union General Sherman fighting toward Atlanta, Georgia
May 15 American Civil War: Battle of Resaca, Georgia ends
May 15 American Civil War: Battle of New Market, Virginia: Students from the Virginia Military Institute fight alongside the Confederate Army to force Union General Franz Sigel out of the Shenandoah Valley
May 20 American Civil War: Battle of Ware Bottom Church – in the Virginia Bermuda Hundred Campaign, 10,000 troops fight in this Confederate victory
May 21 Russia declares an end to the Russian–Circassian War and many Circassians are forced into exile. The day is designated the Circassian Day of Mourning
May 21 American Civil War: the Battle of Spotsylvania Court House ends
May 22 American Civil War: After ten weeks, the Union Army's Red River Campaign ends with the Union unable to achieve any of its objectives
May 26 Montana is organized as a United States territory
May 29 Emperor Maximilian I of Mexico arrives in Mexico for the first time
May 31 American Civil War Overland Campaign: Battle of Cold Harbor – The Army of Northern Virginia under Robert E. Lee engages the Army of the Potomac under Ulysses S. Grant and George Meade
Jun 3 American Civil War: Battle of Cold Harbor – Union forces attack Confederate troops in Hanover County, Virginia
Jun 5 American Civil War: Battle of Piedmont: Union forces under General David Hunter defeat a Confederate army at Piedmont, Virginia, taking nearly 1,000 prisoners
Jun 12 American Civil War, Overland Campaign: Battle of Cold Harbor – Ulysses S. Grant gives the Confederate forces under Robert E. Lee a victory when he pulls his Union troops from their positions at Cold Harbor, Virginia and moves south
Jun 15 American Civil War: The Second Battle of Petersburg begins
Jun 15 Arlington National Cemetery is established when 200 acres (0.81 km2) around Arlington Mansion (formerly owned by Confederate General Robert E. Lee) are officially set aside as a military cemetery by U.S. Secretary of War Edwin M. Stanton
Jun 21 New Zealand Land Wars: The Tauranga Campaign ends
Jun 21 American Civil War: The Battle of Jerusalem Plank Road begins
Jun 29 Ninety-nine people are killed in Canada's worst railway disaster near St-Hilaire, Quebec
Jun 30 U.S. President Abraham Lincoln grants Yosemite Valley to California for "public use, resort and recreation"
Jul 8 Ikedaya Incident: The Choshu Han shishi's planned Shinsengumi sabotage on Kyoto, Japan at Ikedaya
Jul 11 American Civil War: Battle of Fort Stevens; Confederate forces attempt to invade Washington, D.C
Jul 19 Taiping Rebellion: Third Battle of Nanking – The Qing dynasty finally defeats the Taiping Heavenly Kingdom
Jul 20 American Civil War: Battle of Peachtree Creek – Near Atlanta, Georgia, Confederate forces led by General John Bell Hood unsuccessfully attack Union troops under General William T. Sherman
Jul 22 American Civil War: Battle of Atlanta – Outside Atlanta, Georgia, Confederate General John Bell Hood leads an unsuccessful attack on Union troops under General William T. Sherman on Bald Hill
Jul 24 American Civil War: Battle of Kernstown – Confederate General Jubal Early defeats Union troops led by General George Crook in an effort to keep them out of the Shenandoah Valley
Jul 28 American Civil War: Battle of Ezra Church – Confederate troops make a third unsuccessful attempt to drive Union forces from Atlanta, Georgia
Jul 29 American Civil War: Confederate spy Belle Boyd is arrested by Union troops and detained at the Old Capitol Prison in Washington, D.C