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|Or Qapi Fortress|
|Events||Siege of Perekop|
Or Quapi Fortress used to be of great military importance as the key to the Crimean Khanate. During the Russo-Turkish War (1735–1739), the Russian field marshal Burkhard Christoph von Munnich successfully stormed the fortifications on June 17, 1736, and left the Tatar fortress in ruins. This was a serious, if not mortal, blow to the independence of the Crimean Khanate.