Siege of Smolensk
1609 CE.
Shown on the map at 54.783°, 32.045°.
The siege of Smolensk (Polish: oblężenie Smoleńska), also known as the Smolensk Defense in Russia (Russian: Смоленская оборона), lasted 20 months between 29 September 1609 to 13 June 1611, when the Polish army besieged the Russian city of Smolensk during the Polish–Russian War of 1609–1618.
Text from the Wikipedia article Siege of Smolensk (1609–1611), licensed CC BY-SA 4.0.