Approximately 2.5 million to 2.75 million Union troops served in the American Civil War.

Yes the union did win the American Civil War. This is the reason we only have one America.

that was the color of the American soldiers prior to the civil war

The American Civil War was a dispute over the Union and the Confederacy. The war was about the Confederacy (the south) wanting to split off from the Union due to slavery laws in the Union.

West Virginia and Nevada both became states during the American Civil War, and both were Union states.
West Virginia and Nevada became states during the American Civil War, and both were Union states.