| The Encyclopedia of World History. 2001. |
| 1939, June 23 | |
| Treaty between France and Turkey allowed Turkey to take control of the Alexandretta district of northern Syria (Hatay) in return for a pledge of mutual aid in case of aggression. | 1 |
| Aug. 23 | |
| Russo-German pact (See Aug. 23). | 2 |
| Sept. 1 | |
| GERMANY INVADED POLAND (See 1939, Sept. 1). | 3 |
| Sept. 3 | |
| BRITAIN AND FRANCE DECLARED WAR ON GERMANY, and the European phase of World War II began. (See World War II, 19391945) | 4 |
| The Encyclopedia of World History, Sixth edition. Peter N. Stearns, general editor. Copyright © 2001 by Houghton Mifflin Company. Maps by Mary Reilly, copyright © 2001 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved. | |
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