A regular US Navy Admiral, who fought for the Union.

Navy Federal Credit Union was created in 1933.

Navy the confederates were gray

The Union Navy.

Yes - when the Civil War began, the U.S. Navy remained in control of the Union (the United States), while the secessionist States (Confederate States of America), established their own Navy. Naturally, there were vessels and men who were a part of the United States before the split, which became a part of the CSA Navy, but the U.S. Navy officially was the Navy of the Union.