World History Maps Interactive Historical Atlas of the Civil War, detail page for:

Maryland, State before Nov 6, 1860 - after Jun 25, 1865

Thomas H. Hicks US Governor, before Nov 6, 1860 - Jan 8, 1862

Maryland election results: Lincoln 2294 2.5%, Douglas 5966 6.4%, Bell 41760 45.1%, Breckinridge 42482 45.9%, Nov 6, 1860

US Dept. of Washington created District of Columbia and Maryland transferred from Dept. of the East, Apr 9, 1861
US Dept. of Annapolis created adjacent to B&O Railroad between Washington and Baltimore, Apr 27, 1861
House of Delegates votes against secession, Apr 29, 1861
US Dept. of Annapolis renamed to Dept. of Maryland, Jul 19, 1861
Parts of Maryland transferred from US Dept. of Pennsylvania to Dept. of Washington, Jul 25, 1861
US Dept. of Maryland merged into Dept. of Pennsylvania, Jul 25, 1861
US Division of THE POTOMAC created including Depts. Of Washington and Northeastern Virginia, Jul 25, 1861
Washington and Allegheny counties Maryland transferred from US Dept. of Pennsylvania to Dept. of The Shenandoah, Jul 25, 1861
US Dept. of The Potomac created Delaware and Maryland transferred from Dept. of Pennsylvania parts of Virginia included Dept. of Pennsylvania discontinued Depts. Of Washington Northeastern Virginia and Shenandoah discontinued absorbed by Dept. of the Poto, Aug 17, 1861
Pro secession legislators arrested, Sep 12, 1861

Hancock, bombardment, Jan 5, 1862 - Jan 6, 1862
Augustus W. Bradford US Governor, Jan 8, 1862 - after Jun 25, 1865
Western Maryland transferred from US Dept. of the Potomac to Dept. of Western Virginia, Mar 3, 1862
US Dept. of Harpers Ferry and Cumberland discontinued, Mar 12, 1862
US Middle Dept. created Pennsylvania New Jersey Delaware and eastern Maryland transferred from Dept. of the Potomac, Mar 22, 1862
US Dept. of The Rappahannock created including parts of Maryland and Virginia, Apr 4, 1862
US Dept. of The Shenandoah recreated parts of Maryland and Virginia transferred from Dept. of the Potomac, Apr 4, 1862
Forces of the US Depts. Of the Shenandoah Rappahannock and Middle Dept. absorbed by Dept. of the Potomac, Jun 26, 1862
US Dept. of the Rappahannock discontinued divided between Middle Dept. and Dept. of the Potomac, Jun 26, 1862
Maryland campaign, Sep 3, 1862 - Sep 20, 1862
South Mountain, battle, Sep 14, 1862
Antietam, battle, Sep 16, 1862 - Sep 18, 1862

US Dept. of Washington recreated including areas adjacent to Washington DC, Feb 2, 1863
Gettysburg Campaign, Jun 3, 1863 - Aug 1, 1863
Boonsborough, battle, Jul 8, 1863
Maryland west of Monocacy river plus Harpers Ferry Virginia transferred from US Dept. of the Potomac to Dept. of West Virginia, Aug 3, 1863
St Marys county Maryland and Northampton and Accomac counties Virginia transferred to US Middle Dept. from Dept. of Virginia and North Carolina, Dec 21, 1863

Parts of Maryland transferred from US Dept. of the Potomac to Dept. of Washington, Jun 21, 1864
St Marys county Maryland transferred from US Dept. of Virginia and North Carolina to Dept. of Washington, Jun 27, 1864
Monocacy, battle, Jul 9, 1864
Folcks Mill, battle, Aug 1, 1864
Maryland election results: Lincoln 40153 55.1%, McClellan 32739 44.9%, Nov 8, 1864