U-2 Incident. 1960. US spy plane shot down over USSR. Summit cancelled. Pilot Powers traded for Russian spy Abel 1962.

Washington Conference. 1921-2. Naval arms limitation treaty. Four Power Pacific Treaty: US, Japan, Britain, France.

Westminster Conference. 1866-7. Planned independence of Canada under British North America Act.

World Court. 1899 Permanent Court of Arbitration. 1921 Hague Conference created Permanent Court of International Justice. 1945 International Court of Justice.

Yalta Conference. 1945. Churchill, Roosevelt, Stalin. Decided partition of Europe after WWII. USSR enters war vs Japan. Potsdam. San Francisco Peace.