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

The East, US Army Department before Nov 6, 1860 - after Jun 25, 1865

John E. Wool Commander, before Nov 6, 1860 - Oct 26, 1861

US Dept. of Washington created District of Columbia and Maryland transferred from Dept. of the East, Apr 9, 1861
Fort Sumter, bombardment and surrender, Apr 12, 1861 - Apr 14, 1861
Operations in Charleston Harbor , Apr 12, 1861 - Apr 14, 1861
Pennsylvania and Delaware transferred from US Dept. of the East to Dept. of Washington, Apr 19, 1861
US Dept. of The Ohio created Ohio Indiana and Illinois transferred from Dept. of the East., May 3, 1861
Sewells Point, engagement, May 18, 1861 - May 19, 1861
US Dept. of New England created New England states transferred from Dept. of the East, Oct 1, 1861
US Dept. of New York created New York transferred from Dept. of the East, Oct 26, 1861
US Dept. of The East discontinued, Oct 26, 1861

US Dept. of The East recreated merging Dept. of New York and New England states, Jan 3, 1863
John E. Wool Commander, Jan 3, 1863 - Jul 18, 1863
New Jersey transferred from US Middle Dept. to Dept. of The East, Feb 6, 1863
Boston, draft riots, Jul 13, 1863 - Jul 16, 1863
John A. Dix Commander, Jul 18, 1863 - Apr 10, 1865

Brooklyn, draft riots, Jul 13, 1864 - Jul 16, 1864
New York, draft riots, Jul 13, 1864 - Jul 16, 1864
Queens, draft riots, Jul 13, 1864 - Jul 16, 1864

John J. Peck Temp Commander, Apr 10, 1865 - Apr 19, 1865
John A. Dix Commander, Apr 19, 1865 - after Jun 25, 1865