West Virginia admitted to Union

West Virginia was admitted to the Union on June 20, 1863. When Virginia seceded from the Union in 1861, some of its western counties refused to follow while others supported it, and the resulting split led to the admission of West Virginia as a slave state and a key border state during the American Civil War. It was one of two states admitted during the war, along with Nevada, and the only state formed by separating from a Confederate state. (Note: there is no dedicated English Wikipedia article titled "West Virginia admitted to Union"; these facts are drawn from the lead of the West Virginia article.)