The U.S. state of West Virginia was formed out of western Virginia and added to the Union as a direct result of the American Civil War, in which it became the only modern state to have declared its independence from the Confederacy. In the summer of 1861, Union troops, which included a number of newly formed Western Virginia regiments, under General George McClellan drove off Confederate troops under General Robert E. Lee at the Battle of Philippi in Barbour County. This essentially freed Unionists in the northwestern counties of Virginia to form a functioning government of their own as a result of the Wheeling Convention. Before the admission of West Virginia as a state, the government in Wheeling formally claimed jurisdiction over all of Virginia, although from its creation it was firmly committed to the formation of a separate state.
The Battle of Princeton Court House was fought May 15–17, 1862 in Mercer County, Virginia in conjunction with Stonewall Jackson's Valley Campaign. It was a minor victory for the Confederate States Army.
The Battle of Charleston was a Confederate victory in Kanawha County, Virginia, on September 13, 1862, during the American Civil War. Troops led by Major General William W. Loring defeated a Union force led by Colonel Joseph Andrew Jackson Lightburn. This battle, which featured extensive use of artillery but few casualties, was the second major fight in Loring's Kanawha Valley Campaign of 1862 that succeeded in driving Union forces out of the Kanawha River Valley. All points in the Kanawha River Valley were in the southwestern part of Virginia at the time of the battle, but are now part of the state of West Virginia.
The 9th West Virginia Infantry Regiment was an infantry regiment that served in the Union Army during the American Civil War.
The 2nd West Virginia Cavalry Regiment served in the Union Army during the American Civil War. It was organized in Parkersburg, Virginia during September 1861. Most of the original members of this regiment were from southeastern Ohio, and planners thought that this regiment would become the 4th Ohio Cavalry. Their application was rejected by the governor of Ohio, so the unit became the 2nd Regiment of Loyal Virginia Volunteer Cavalry. The "Loyal Virginia" part of the name was replaced with "West Virginia" after the state of West Virginia was officially admitted to the Union in 1863. Today, the National Park Service lists them as 2nd Regiment, West Virginia Cavalry under a heading of Union West Virginia Volunteers.
The 21st Ohio Infantry Regiment was an infantry regiment in the Union Army during the American Civil War. Mostly an all-volunteer unit, with the exception of a few draftees, the 21st Ohio served for both ninety-day and three-year enlistments and fought exclusively in the Western Theater. It saw action in some of the war's bloodiest battles including Stones River, Chickamauga, the Atlanta Campaign, and Sherman's March to the Sea.
The 22nd Virginia Infantry Regiment was an infantry regiment from the western Virginia that served in the Confederate States Army during the American Civil War. Its commander was George S. Patton Sr., the grandfather of World War II General George S. Patton.
The 26th Ohio Infantry Regiment was an infantry regiment in the Union Army during the American Civil War. It was often referred to by its members as the Groundhog Regiment.
Carr Baily White (1823–1871) was a physician, an officer during the Mexican War and a general during the American Civil War. His Civil War service was entirely in western Virginia and Maryland.
The Kanawha Division was a Union Army division which could trace its origins back to a brigade originally commanded by Jacob D. Cox. This division served in western Virginia and Maryland and was at times led by such famous personalities as George Crook and Rutherford B. Hayes.
The 36th Virginia Infantry Regiment was an infantry regiment mostly raised in the Kanawha Valley for service in the Confederate States Army during the American Civil War. It fought mostly in western Virginia, Tennessee, and Kentucky.
The 30th Ohio Infantry Regiment was an infantry regiment in the Union Army during the American Civil War.
The 15th Arkansas Infantry Regiment, also known as the "Northwest regiment", was an infantry formation of the Confederate States Army during the American Civil War. It was originally formed as the 3rd Arkansas Infantry Battalion. After receiving the requisite ten companies, the battaltion was redesignated as the 21st Arkansas Infantry Regiment. Upon discovery that there was already another "21st Arkansas," the Northwest Regiment was again redesignated as the 15th Arkansas Infantry Regiment. This was the third Arkansas regiment to bear the designation "15th Arkansas." The others are Johnson's and Josey's Arkansas infantry regiments. Members of the Northwest Regiment fought both west and east of the Mississippi River before participating in the Vicksburg campaign, surrendering at Vicksburg in July 1863. After being paroled and exchanged, the regiment was consolidated with other state units to form the 1st Consolidated Arkansas Infantry Regiment.
The western Virginia campaign, also known as operations in western Virginia or the Rich Mountain campaign, occurred from May to December 1861 during the American Civil War. Union forces under Major General George B. McClellan invaded the western portion of Virginia to prevent Confederate occupation; this area later became the state of West Virginia. West Virginians on both sides would fight in the campaign while a Unionist convention in Wheeling would appoint their choice for a Unionist governor for Virginia, Francis H. Pierpont, and promote the creation of a new state in western Virginia. Large scale Confederate forces would gradually abandon the region, leaving it to small local brigades to maintain hold on southern and eastern sections for much of the war.
The Sinking Creek Raid took place in Greenbrier County, Virginia during the American Civil War. On November 26, 1862, an entire Confederate army camp was captured by 22 men from a Union cavalry during a winter snow storm. The 22 men were the advance guard for the 2nd Loyal Virginia Volunteer Cavalry, which was several miles behind. This cavalry unit was renamed 2nd West Virginia Volunteer Cavalry in 1863, after West Virginia became a state.
The Battle of Lewisburg occurred in Greenbrier County, Virginia, on May 23, 1862, during the American Civil War. A Union brigade commanded by Colonel George Crook soundly defeated a larger Confederate force commanded by Brigadier General Henry Heth. Panicked Confederate forces escaped by crossing and burning a bridge across the Greenbrier River.
The Kanawha Valley Campaign of 1862 was Confederate Major General William W. Loring's military campaign to drive the Union Army out of the Kanawha River Valley during the American Civil War. The campaign took place from September 6 through September 16, 1862, although an important raid that had impact on the campaign started on August 22. Loring achieved success after several skirmishes and two battles, and Union troops retreated to the Ohio River and the safety of the state of Ohio.
The Battle of Fayetteville occurred in Fayette County, Virginia, on September 10, 1862, during the American Civil War. A Confederate Army, consisting of multiple brigades commanded by Major General William W. Loring, drove away a Union brigade commanded by Colonel Edward Siber. The battle is part of the Kanawha Valley Campaign of 1862.
Jenkins' Trans-Allegheny Raid was a Confederate cavalry expedition in the American Civil War that took place in Western Virginia and Ohio during August and September 1862. The raid was led by Brigadier General Albert G. Jenkins, and it started on August 22 as a preliminary step in Confederate Major General William W. Loring's military campaign to drive the Union Army out of the Kanawha River Valley. That campaign, known as the Kanawha Valley Campaign of 1862, took place from September 6 through September 16. The purpose of Jenkins' raid was to get behind the Union Army outposts located near the beginning of the Kanawha River, and cut off their main route of retreat to the safety of Ohio.
The Battle of Kanawha Gap, also known as the Battle of Chapmanville, was a Civil War battle fought near Chapmanville, West Virginia on September 25, 1861, as part of the Western Virginia campaign. A column of Union soldiers from the Kanawha Brigade commanded by Col. Piatt and Col. Enyart, set out on an expedition from Camp Enyart to attack a Confederate camp near Chapmanville and drive Confederate forces from the Kanawha valley.
United States of America (Union)
Confederate States of America 
