Winslow Homer's Veteran in a New Field is a commentary on the aftermath of which conflict?

A) French peasants' revolt
B) French revolution
C) American Civil War
D) Crimean war

Veteran in a New Field

Refers usually to someone with profound experience in one domain who starts anew in a different field or context.

American Civil War

The American Civil War, fought from 1861 to 1865, was a significant conflict in the United States between the Northern states (Union) and the Southern secessionist states (Confederacy), primarily over issues of slavery and states' rights.