Thursday July 11 1861
- Maj. Gen. Nathaniel Prentiss Banks, USA, supersedes Bvt. Maj. Gen. George Cadwalader, PA Troops, in command of the Dept. of Annapolis, MD.
- Engagement at Rich Mountain, and Laurel Hill, WV, where overall commanding general, Maj. Gen. George B. McClellan, USA, claims victory over Brig. Gen. Robert S. Garnett, CSA, as Garnett withdraws into the Cheat River Valley, WV.
Friday July 11 1862
- Maj. Gen. Henry Wager "Old Brains" Halleck, USA, is assigned to command as General-in Chief of all the US land forces.
- Skirmishes at Sears'House and Big Creek Bluff, near Pleasant Hill, MO.
- Federal reconnaissance from Harrison's Landing, beyond Charles City Court-House, VA, toward Williamsburg, VA.
Saturday July 11 1863
- Daniel Harvey Hill. C.S.A.. is appointed Lieut. Gen.
- Skirmish at Pekin, Indiana, with Brig. Gen. John Hunt Morgan, CSA.
- Skirmish at Stockton, MO, with bushwackers.
- The first Union assault on Battery Wagner, Morris Island, SC, led by Brig. Gen. Quincy A. Gillmore, USA, is repulsed.
- Federal reconnaissance from Cowan to Anderson, TN. (Jul 11-14)
- Federal reconnaissance to, and skirmish (Jul 12) at, Ashby's Gap, VA. (Jul 11-14)
Monday July 11 1864
- Federal scout from Gunter's Landing to Warrenton, AL, and skirmish with Confederates who refuse to yield but are driven back, while the Yankees capture men who are deserters.
- The US Naval destruction of Confederate saltworks near Tampa, FL.
- The Confederate capture of railroad trains at Magnolia, MD.
- Skirmish at Frederick, MD.
- The District of Columbia militia is called into service of the United States.
- Skirmishes at and near Pontotoc, MS, with Maj. Gen. Andrew J. Smith, USA, and Confederates under Lieut. Gen. Stephen D. Lee, CSA, commanding the Dept. of Alabama, Mississippi and East Louisiana. (Jul 11-12)
- Maj. Gen. Edward O. C. Ord, USA, is assigned to the command of the 8th US Army Corps and of the troops in the Middle Dept., VA.
- The Skirmish near Fort Stevens, Washington, DC, between Lieut. Gen. Jubal A. Early, CSA, and Union troops. President Abraham Lincoln observes the fighting from the trenches.
- The 1st and 2nd Divisions, 6th US Army Corps, and an advanced detachment of the 19th US Army Corps, arrive at Washington, DC. (Jul 11-12)
- Maj. Gen. Quincy A. Gillmore, USA, is assigned to the command of the detachment of the 19th US Army Corps in the Dept. of Washington, DC.
Tuesday July 11 1865No events on this date.
On This Day information kindly provided by Martin Cross, 2nd U.S. Artillery, Bty B.