Record Data Place Unit Type Rivers/Waterways Containing Unit United States of America Events Date Type 04/01/1862 In the Shenandoah Valley, Union forces skirmish with retreating Confederates around Woodstock Battles/Soldiers 04/04/1862 President Lincoln creates two new army departments, one directly protecting Washington DC Battles/Soldiers 04/16/1862 Scores of Philadelphia German volunteers drown while crossing the Shenandoah in western Virginia Crime/Disasters People Documents Date Title 04/20/1852 New York Times, “Great Floods in the Potomac and Shenandoah,” April 20, 1852 Images