Two states were born during the Civil War, and a third right after.
When Virginia seceded and joined the Confederacy, a big chunk of northwestern Virginia decided to break away from the state- they wanted to stay in the Union. It was a weird legal maneuver that basically amounted to West Virginia taking over Virginia's place in the Union, since Virginia had seceded.
Around the time the Civil War began, Nevada split off from the Utah territory. In 1864, Congress rushed through making Nevada territory into a state, so that they could participate in the presidential election. Nevada officially became a state eight days before the election- although Lincoln won in a landslide, and wound up not needing help from the new state.
Two years after the Civil War ended, Nebraska became a state too. However, it was not directly related to the events of the Civil War (although many Nebraskans had fought for the Union).
Jamaica
The state of Kansas
West Virginia
Montana was not a State at the time of the Civil War.
The Civil War in France was created in 1871.
The Second Civil War was created in 1997.
The Civil War - album - was created in 2004.
America's Civil War was created in 1988.
Civil War Times was created in 1962.
Civil War - album - was created in 2008-07.
The causes of the civil war were complex. Not just one state caused it
West Virginia and it was seceded from a Confederate state on April 17, 1861.