In reading order
The World War 2 Trivia Book: Interesting Stories and Random Facts from the Second World War
Bill O'Neill, Dwayne Walker
The Vietnam War Trivia Book: Fascinating Facts and Interesting Vietnam War Stories
Bill O'Neill, Dwayne Walker
The American Civil War Trivia Book: Interesting American Civil War Stories You Didn't Know
Bill O'Neill
The Korean War Trivia Book: Interesting Stories and Random Facts from the Korean War
Bill O'Neill
The American Revolutionary War Trivia Book: Interesting Revolutionary War Stories You Didn't Know
Bill O'Neill
The World War 1 Trivia Book
Bill O'Neill