At the northern corner of Sanam Luang stands a Monument dedicated to the Thai expeditionary force that fought on European battlefields during World War I. Following the outbreak of war in 1914, Thailand aligned with the Allied forces, declared war on Germany, and deployed troops to Europe on June 20, 1918. Upon their return to Thailand on September 21, 1919, the ashes of the deceased soldiers were enshrined at this monument on September 24, 1919.