Pennsylvania 100th Volunteer Infantry (Union)

    31 Aug 1861

    Pennsylvania 100th Volunteer Infantry organized at Pennsylvania.

    01 Sep 1862

    Assigned to the Division led by .

    14 Sep 1862

    Participated in the Battle of South Mountain at Frederick County, Maryland; Washington County, Maryland; Boonsboro, Maryland.

    The Battle of South Mountain
    The Battle of South Mountain

    After his success at Second Manassas, Gen. Robert E. Lee led the Army of Northern Virginia north across the Potomac River on an invasion of Maryland in September of 1862. Lee divided his army, sending a portion of it into western Maryland while Lieut. Gen. Stonewall Jackson's wing attempted to capture the Federal garrison at Harper's Ferry. The bold plan was jeopardized on September 13th when a mislaid copy of Lee's orders revealing the Confederates' plans was given to Union commander Maj. Gen. George B. M… Read More

    17 Sep 1862

    Assigned to the Regiment led by .

    17 Sep 1862

    Assigned to the Brigade led by .

    17 Sep 1862

    Assigned to the Division led by .

    18 May 1863

    Assigned to the Regiment led by .

    18 May 1863

    Assigned to the Brigade led by .

    18 May 1863

    Assigned to the Division led by .

    18 May 1863

    Participated in the Battle of Vicksburg at Vicksburg, Mississippi.

    The Battle of Vicksburg
    The Battle of Vicksburg

    In mid-May, 1863, after six months of unsuccessful attempts, Maj. Gen. Ulysses S. Grant's Army of the Tennessee finally converged on Vicksburg, defended by a Confederate army under Lt. Gen. John C. Pemberton. Capture of the Mississippi River town was critical to Union control of the strategic river. Vicksburg was located on a high river bluff defended with artillery, and Pemberton's men had constructed a series of fortifications in an 8-mile arc surrounding the city on the landward side. After crossing the… Read More

    05 May 1864

    Assigned to the Regiment led by .

    05 May 1864

    Assigned to the Division led by .

    05 May 1864

    Participated in the Battle of Wilderness at Spotslyvania County, Virginia; Orange County, Virginia.

    The Battle of Wilderness
    The Battle of Wilderness

    The first battle between Lt. Gen. Ulysses S. Grant and Gen. Robert E. Lee erupted late in the morning of May 5, 1864, as Maj. Gen. Gouverneur K. Warren's Union V Corps attacked Lt. Gen. Richard S. Ewell's Second Corps on the Orange Turnpike southwest of the old Chancellorsville battlefield. Although Federal infantry managed to break through at several points, the Confederate line held. Fighting shifted to the south as Lt. Gen. A.P. Hill's Third Corps engaged Maj. Gen. Winfield S. Hancock's II Corps and ele… Read More

    08 May 1864

    Assigned to the Brigade led by .

    08 May 1864

    Assigned to the Division led by .

    08 May 1864

    Assigned to the Division led by .

    31 May 1864

    Participated in the Battle of Cold Harbor at Hanover Co; near Mechanicsville, VA.

    The Battle of Cold Harbor
    The Battle of Cold Harbor

    After two days of inconclusive fighting along Totopotomoy Creek northeast of Richmond, Lt. Gen. Ulysses S. Grant and Gen. Robert E. Lee turned their sights on the crossroads of Cold Harbor. Roads emanating through this critical junction led to Richmond as well as supply and reinforcement sources for the Union army. On May 31, 1864, Maj. Gen. Philip Sheridan's cavalry captured Cold Harbor. The next day, Sheridan held the crossroads against a Confederate attack. With reinforcements from both armies arriving… Read More

    21 Jun 1864

    Participated in the Battle of Jerusalem Plank Road at Petersburg, Virginia.

    24 Jul 1864

    Pennsylvania 100th Volunteer Infantry mustered out at Pennsylvania.

    30 Jul 1864

    Participated in the Battle of Crater at Petersburg, VA.

    The Battle of Crater
    The Battle of Crater

    Two weeks after Union forces arrived to invest the Confederate defenders of Petersburg, the battle lines of both sides had settled into a stalemate. Since Cold Harbor, Lieut. Gen. Ulysses S. Grant was reluctant to mount a frontal attack against well-entrenched Confederates. By late June, Grant's lines covered most of the eastern approaches to Petersburg, but neither side seemed ready to risk an offensive move. Part of the Union line was held by Maj. Gen. Ambrose E. Burnside's Ninth Corps. Some of Burnside'… Read More

    18 Aug 1864

    Assigned to the Brigade led by .

    18 Aug 1864

    Assigned to the Division led by .

    25 Mar 1865

    Assigned to the Regiment led by .

    25 Mar 1865

    Assigned to the Brigade led by .

    25 Mar 1865

    Assigned to the Division led by .

    25 Mar 1865

    Assigned to the Regiment led by .

    25 Mar 1865

    Assigned to the Brigade led by .

    02 Apr 1865

    Participated in the Battle of Third Petersburg at Dinwiddie County, Virginia; Petersburg, Virginia.

    The Battle of Third Petersburg
    The Battle of Third Petersburg

    With the Confederate defeat at Five Forks on April 1st, Lieut. Gen. Ulysses S. Grant and Maj. Gen. George Meade ordered a general assault against the Petersburg lines by the Second, Ninth, Sixth and Twenty-Fourth Corps to take place April 2nd. In the pre-dawn darkness, the Union infantry gained a successful breakthrough where Maj. Gen. Horatio G. Wright's advancing Sixth Corps met the Confederate lines held by Maj. Gen. A. P. Hill near the Boydton Plank Road. Hill was killed trying to reach his troops in t… Read More

    09 Apr 1865

    Participated in the Battle of Appomattox Court House at Appomattox Court House, VA.

    The Battle of Appomattox Court House
    The Battle of Appomattox Court House

    Between 26,000 and 28,000 Confederate soldiers surrendered and were paroled. Read More