Instructions: Generate a correct and concise answer for the question based on the words in the context.
Input: Context : Lewis Locke (born Louis Tacy) (November 5, 1835 - January 4, 1920) was a Private in the Union Army and a Medal of Honor recipient for his actions in the American Civil War.
Question : In what war was Lewis Locke a combatant?
Output:
American Civil War