Khan Academy
Khan Academy: Ap Us History: 1890 1945: The Us in Wwi: The Treaty of Versailles
Looks at the Treaty of Versailles, what its terms were, why America never ratified it or joined the League of Nations, why Germans grew to resent the burdens it imposed on them, and how this contributed to Hitler's rise to power....
Other
Kasprzyk's Website: A Summary of Poland's History
A description of the history of Poland, starting with the Piast dynasty and moving forward to the current year.
Curated OER
Etc: Maps Etc: The Great Powers and Imperialism in China, 1919
A map of China from 1919 showing the territorial possessions claimed in the country under European and Japanese imperialism after the Treaty of Shimonoseki (1895) between Japan and China, and the Conference of Paris, or Paris Peace...