Which major Civil War battle occurred in West Virginia?

The Battle of Philippi is significant as it was one of the first land battles of the Civil War to occur in West Virginia, which was still a part of Virginia at that time. Fought on June 3, 1861, this battle marked an early engagement between Union and Confederate forces after West Virginia declared its intention to separate from Virginia. The Union forces, led by Colonel Benjamin Kelley, successfully engaged the Confederate troops, leading to a Union victory that bolstered morale and helped to secure Union control in western Virginia. This battle is often noted for its strategic importance in the context of the state's eventual separation from Virginia and its admission to the Union in 1863.

Other battles listed, such as Gettysburg, Antietam, and Bull Run, took place outside of West Virginia and are more widely known for their pivotal roles in the overall war but are not associated with the state specifically.