While Crane often wrote about the Civil War, Hemingway often wrote about

A.

World War I.

B.

World War II.

C.

the Korean War.

D.

the Vietnam War.

While Crane often wrote about the civil war, Hemingway often wrote about, A. World War l.

A Farewell to Arms is a novel by Ernest Hemingway set during the Italian campaign of World War l.

So the answer, which I stated above is, A. World War l.