June 3: The Soviet government offers its definition of what constitutes "aggression", upon which the projected Anglo-Soviet-French alliance will come into effect. The French Foreign Minister Georges Bonnet accepts the Soviet definition of aggression at once. The British reject the Soviet definition, especially the concept of "indirect aggression", which they feel is too loose a definition and phrased in such a manner as to imply the Soviet right of inference in the internal affairs of nations of Eastern Europe.

June 4: The St. Louis, a ship carrying a cargo of 907 Jewish refugees, is denied permission to land in Florida after already having been turned away from Cuba. Forced to return to Europe, many of its passengers later die in Nazi death camps during the Holocaust.

June 12: The National Baseball Hall of Fame and Museum is officially dedicated in Cooperstown, New York.

June 14: Tientsin Incident: The Japanese blockade the British concession in Tianjin, China, beginning a crisis which almost causes an Anglo-Japanese war in the summer of 1939.

June 17: In the last public guillotining in France, murderer Eugen Weidmann is decapitated by the guillotine.

June 21: New York Yankees announce Lou Gehrig's retirement after doctors reveal he has amyotrophic lateral sclerosis.

June 23: Talks are completed in Ankara between French Ambassador René Massigli and Turkish Foreign Minister Sukru Saracoglu, resolving the Hatay dispute in Turkey's favor. Turkey annexes Hatay.

June 24: The government of Siam changes its name to Thailand, which means 'Free Land'.

June 29: Ford 9N tractor with Ferguson hydraulic three-point hitch first demonstrated at Dearborn, Michigan. (source: Wikipedia)