Today in Military History:
December 20
Events of Military significance on this day:
| | 1712 | Battle of Gadebesk. 24,000 Danes and Saxons defeated by 12,000 Swedes. |
| | 1803 | Louisiana Purchase officially transferred. |
| | 1860 | Battle of Calpulalpam. Forces of Benito Juarez defeated the Federales precipitating the downfall of the Mexican government. |
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