Great War & Jazz Age (1914-1928). This song was meant to express the voice of children during World War I: We want our Daddy dear, back home (Hello Central, give me France). World War I Ended With the Treaty of Versailles June 28, 1919. World War I (1914-1918) was finally over. This first global conflict had claimed from 9 million to 13 million lives and caused unprecedented damage. Germany had formally surrendered on November 11, 1918, and all nations had agreed to stop fighting while the terms of peace were negotiated. On June 28, 1919, Germany and the Allied Nations (including Britain, France, Italy and Russia) signed the Treaty of Versailles, formally ending the war.