Siege of Riga
1812 CE.
Shown on the map at 56.947°, 24.107°.
The siege of Riga was a military operation during the Napoleonic Wars. The siege lasted five months from July – December 1812, during which the left flank of Napoleon's "Great Army" (La Grande Armée) tried to gain a favorable position for an attack on Russian-controlled port city Riga, the capital of the Governorate of Livonia. They failed to cross the Daugava River, and accordingly the siege was not carried out completely.
Text from the Wikipedia article Siege of Riga (1812), licensed CC BY-SA 4.0.