George B. McClellan

George B. McClellan was a Union general who organized and commanded the Army of the Potomac during the American Civil War and ran for president as a Democrat in 1864.

Peninsula Campaign: A 1862 Union campaign to capture Richmond by advancing up Virginia’s Peninsula between the York and James rivers. McClellan led the campaign, which brought Union forces close to Richmond before Confederate counterattacks forced retreat.
Abraham Lincoln: The 16th president of the United States, who led the Union during the Civil War and issued the Emancipation Proclamation. Lincoln repeatedly pressed McClellan to act and removed him from command after Antietam.
Army of the Potomac: The Union’s principal army in the eastern theater of the American Civil War. McClellan built this army into a large, disciplined force and commanded it during its early major campaigns.
1864 United States presidential election: The United States presidential election in which Abraham Lincoln defeated George B. McClellan during the Civil War. McClellan ran as the Democratic nominee while still serving as a major Union general.
Maryland Campaign: Robert E. Lee’s 1862 invasion of Maryland and the Union campaign that culminated at Antietam. McClellan’s handling of the campaign secured a strategic Union outcome but did not restore Lincoln’s confidence.
Seven Days Battles: A series of battles near Richmond in June and July 1862 that ended the Union Peninsula Campaign. The fighting drove McClellan’s army away from Richmond and shaped his reputation for strategic caution.
Robert E. Lee: The principal Confederate field commander in the eastern theater of the American Civil War. Lee’s maneuvers repeatedly confronted McClellan, especially during the Peninsula Campaign and Maryland Campaign.
American Civil War logistics: The systems for supplying, transporting, and sustaining armies during the American Civil War. McClellan emphasized supply lines and organization as foundations for advancing the Army of the Potomac.
National Union Party: A wartime coalition that nominated Abraham Lincoln for president in 1864, bringing together Republicans and pro-war Democrats. It opposed McClellan’s Democratic candidacy and supported continuing the war until Union victory.
1864 Democratic National Convention: The convention in Chicago that nominated McClellan for president and adopted a platform calling for an end to the war. McClellan’s nomination made his military reputation central to the Democratic campaign.

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