Watch World War I: The Great War Season 1 Episode 4 Online

Experts discuss the political personalities and intolerance behind the "War to End All Wars." Discover the history behind the first weapons of mass destruction, why they were created, and how they were made. Look at documents that were once classified for reasons of national security and discover why they were kept secret. We uncover the forgotten story of the secret deals government mistakes political intolerance and America's role in the war. We mine formerly guarded vaults and archives worldwide reviewing once top-secret footage and declassified materials to search for the facts behind the thrilling stories with which we've become familiar.