09/24/1861
At Point of Rocks, Union troops on the Maryland side skirmish with Confederate units across the Potomac Battles/Soldiers
04/15/1865
Fugitive John Wilkes Booth rides into Maryland and reaches the farm of Dr. Samuel Mudd at four a.m. Crime/Disasters
04/25/1865
In the Potomac Estuary, scores of soldiers drown after a midnight collision between steamships Crime/Disasters
04/17/1865
- 04/20/1865
John Wilkes Booth and David Herold are hiding from their pursuers in a remote Maryland pine thicket Crime/Disasters
11/11/1861
On the Potomac, Thaddeus Lowe launches the first balloon observation flight from a naval craft Science/Technology
11/10/1861
On the Potomac, Thaddeus Lowe's balloon carrier is towed into position off Mattawoman Creek Science/Technology
10/06/1860
- 10/07/1860
Prince Albert makes a brief visit to Richmond, Virginia US/the World
01/01/1857
Robert Brown, a fugitive slave from Virginia, arrives in Philadelphia after crossing Potomac on horseback Slavery/Abolition
02/05/1867
The breaking up of the ice dams on the Potomac carries away Washington, D.C.'s Long Bridge. Crime/Disasters
07/13/1863
- 07/14/1863
The Confederate invasion of Pennsylvania ends when Lee's troops slip away across the Potomac in the night Battles/Soldiers
07/06/1863
- 07/07/1863
The retreating Army of Virginia reaches the Potomac and finds it flooded and impassable Battles/Soldiers
06/20/1863
- 06/22/1863
The Second Corps of the Army of Virginia crosses the Potomac and marches on Pennsylvania Battles/Soldiers
09/15/1861
Union troops push back attacking Virginia units around Harpers Ferry near Pritchard's Mill on the Potomac Battles/Soldiers
10/11/1861
United States Navy raiding party crosses the Potomac and destroys a Confederate schooner in Dumfries Creek Battles/Soldiers
06/05/1860
Virginia Republican arrested for circulating anti-southern literature Lawmaking/Litigating
