Liberty Memorial

The groundbreaking ceremony on November 1, 1921, was attended by 200,000 people, including Vice President Calvin Coolidge, Lieutenant General Baron Jacques of Belgium, Admiral of the Fleet Lord Beatty of Great Britain, General Armando Diaz of Italy, Marshal Ferdinand Foch of France, General of the Armies John J. Pershing of the United States, and 60,000 members of the American Legion.

The local veteran chosen to present flags to the commanders was a Kansas City haberdasher, Harry S. Truman, who would later serve as 33rd President of the United States from 1945 to 1953. The finished monument was dedicated on November 11, 1926, by 30th President Coolidge, in the presence of Queen Marie of Romania.

On December 19, 2014, President Barack Obama signed legislation recognizing it as "a 'World War I Museum and Memorial'", which resulted in redesignation of the entire site as the National World War I Museum and Memorial.