Ernest Hemmingway's novel For Whom the Bell Tolls was set in the American Civil War between 1929 and 1936. The Civil War referred to the American Civil War from October 1929 to November 1933. It was also one of the most important wars of the 20th century. The novel tells the story of the resistance of the Southern plantation class and the struggle of the Northern army during the Civil War. It shows the profound impact of war on human nature, family and society.