Siege of Opochka

The siege of Opochka was an unsuccessful attempt by the Grand Duchy of Lithuania and the Kingdom of Poland to conquer the Russian fortress of Opochka during the Fourth Muscovite–Lithuanian War.

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Siege of Opochka
Part of Fourth Muscovite–Lithuanian War
Date 20 September – 18 October 1517 Location Opochka fortress 56°42′43″N 28°39′23″E Result Russian victory[1]
Belligerents
Grand Duchy of Lithuania Kingdom of Poland	Grand Duchy of Moscow
Commanders and leaders
Konstanty Ostrogski Janusz Świerczowski [pl] Jerzy Radziwiłł	Vasily Morozov-Saltykov Fyodor Lopata Telepnev-Obolensky [ru] Ivan Lacki [ru]
Strength
14,000[a]	150[5] 10,000-12,000 in blockade relief detachments
Casualties and losses
About 5,000[4]	Unknown

Close

Russian troops were able to successfully defend the fortress and inflict heavy damage on the Poles and Lithuanians,^[6] avenging the defeat at Orsha three years ago.^[7] The replies of the Polish king Sigismund did not describe the course of the siege, but the invented battle of Opochka, where the Russians allegedly lost.^[8]