1937Turkey, Iran, Iraq, and Afghanistan sign the Treaty of Saadabad.[†]
The Treaty of Saadabad was a non-aggression pact signed by Turkey, Iran, Iraq and Afghanistan on July 8, 1937, and lasted for five years. The treaty was signed in Tehran's Saadabad Palace and was part of an initiative for greater Middle Eastern-oriental relations spearheaded by King Mohammed Zahir Shah of Afghanistan. Ratifications were exchanged in Tehran on June 25, 1938, and the treaty became effective on the same day. It was registered in the League of Nations Treaty Series on July 19, 1938.