Corporal Joseph Pierce, who served with the Connecticut Volunteer Infantry during the Civil War
Although only about 200 people of Chinese descent lived in the eastern United States, there were at least 58 who fought in the Civil War. (Note that I don’t say “Chinese Americans” because at the time Chinese people could not become U.S. citizens.)
Article here. You can also listen to an interview with writer Ruthanne Lum McCunn.