- Mar 2 British newspaper "Morning Chronicle" begins publishing
- Mar 2 Conferate General Early's army is defeated at the battle of Waynesboro, Virginia, during American Civil War
- Mar 2 Freedman's Bureau founded for Black Education, 1865
- Mar 2 Second Taranaki War: The Volkner Incident in New Zealand.
- Mar 3 Opening of the Hongkong and Shanghai Banking Corporation, the founding member of the HSBC Group.
Bureau of Refugees, Freedmen, & Abandoned Lands
Mar 3 US Bureau of Refugees, Freedmen, & Abandoned Lands established by Abraham Lincoln to help destitute free blacks
Booth Attends Lincoln Inauguration
Mar 4 Abraham Lincoln inaugurated for his 2nd term as US President. The man who would assassinate him weeks later, John Wilkes Booth, is photographed attending the inauguration.
- Mar 4 US Confederate congress approves final design of "official flag"
- Mar 6 Battle of Natural Bridge, Florida
- Mar 6 US President Abraham Lincoln's Second Inaugural Ball
- Mar 7 -10] Battles around Kinston, North Carolina
- Mar 8 27th Grand National: Captain Henry Coventry wins aboard French outsider Alcibiade at 100/7
- Mar 8 Battle of Kingston, North Carolina (Wilcox's ridge, Wise's Forks)
- Mar 10 Battle of Monroe's Crossroads, North Carolina
Sherman Occupies Fayetteville
Mar 11 General William T. Sherman's Union forces occupies Fayetteville, North Carolina
Confederates Authorize Slave Soldiers
Mar 13 Confederate President Jefferson Davis signs bill authorizing use of slaves as soldiers during last weeks of the US Civil War
- Mar 16 Battle of Averasboro North Carolina (1,500 casualties)
- Mar 18 Battle of Wilson's raid to Selma, Alabama
- Mar 18 Congress of Confederate States of American adjourns for last time
- Mar 19 Battle of Bentonville, Confederates retreat from Greenville North Carolina
- Mar 20 2nd day of Battle of Bentonville, North Carolina
- Mar 20 Michigan authorizes workers' cooperatives
- Mar 21 Battle of Bentonville ends, last Confederate effort to stop Sherman
- Mar 22 Wilson's Raid: 13,480 cavalry troops led by Union General James H. Wilson destroys most of Confederate Alabama and Georgia's arms-manufacturing and rail capabilities; raid lasts through mid-April [1] [2]
- Mar 23 General Sherman and Cox' troops reach Goldsboro, North Carolina
- Mar 25 Battle of Bluff Spring, Florida
- Mar 25 Battle of Mobile, Alabama (Spanish Fort, Fort Morgan, Fort Blakely)
- Mar 25 Battle of Petersburg: Confederate forces launch an unsuccessful counterattack on Fort Stedman
- Mar 25 SS General Lyon at Cape Hatteras catches fire & sinks, killing 400
- Mar 27 Siege of Spanish Fort, AL-captured by Federals
- Mar 29 -Apr 9th], Appomattox campaign, Virginia, 7582 killed
- Mar 29 Battle of Lewis's Farm [alt. Quaker Road, Gravelly Run], in Dinwiddie County, Virginia begins (Union victory)
- Mar 30 -4] Battle at 5 Forks, Virginia
- Mar 31 Battle of Boydton, Virginia (White Oaks Roads, Dinwiddie C H)
- Mar 31 General Pickett moves to 5 Forks, abandoning the defense of Petersburg
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