Crimean Blockade
Part of the Ottoman-Cossack Conflict
Date 6 July – 14 September 1655 Location Crimea Result Cossack victory[1]
Belligerents
Zaporozhian Cossacks Don Cossacks	Crimean Khanate Nogai Horde Ottoman Empire
Commanders and leaders
Ivan Sirko Ataman Dergun Pavel Chesnochikhin	Mehmed IV Giray Adil Giray Mehmed IV
Strength
700 200[2] 34 boats[1]	100,000+[1] Unknown (but more than Cossacks)
Casualties and losses
30 killed[1]	Heavy combat losses; 400+ captured[1]

The Crimean Blockade was enacted by the Zaporozhian-Don Cossacks with the goal of delaying the Crimean support for Poland-Lithuania, from 6 July to 14 September 1655.

Cossack-Russian army intended to send their main forces for offensives in Western Ukraine. However, this left Ukrainian territories vulnerable to Tatar attacks from the south, who were allied with Poland-Lithuania. Cossacks conducted a number of raids in late April and early May on Tatar and Ottoman territories to deter them. Sultan Mehmed IV was dissatisfied with Khan Mehmed IV Giray's support for Poles in their war, since it left Ottoman territories vulnerable to Cossack raids. Rumours later spread about more attacks that will come from Cossacks and Kalmyks on Crimea, which caused Khan to gather over 100,000 Tatar troops near Perekop and put out patrols to monitor any activity, withholding their planned campaign for defense. However, Cossacks were going to conduct a campaign on the sea in the part of Crimea where they were least expected. Cossacks on 34 boats were to set out for campaign, led by Zaporozhian Ataman Dergun and Don commander Pavel Chesnochikhin.^[1] Ivan Sirko was among organizers of the campaign.^[3] Kalmyks were unable to take part in the campaign due to plague in Astrakhan.^[4]

On July 6, Cossack boats entered the Kerch strait. Cossacks kept the Kerch blocked for 10 days, keeping the population of Kerch and Taman in fear, while ravaging Tatar villages nearby. On July 15, Cossacks captured Taman.^[2] From there, Cossacks ravaged Azov and Black Sea coasts of Crimea. On July 22, Cossacks attacked Kerch, which was more difficult to seize as it was defended by Ottoman Sipahi cavalry, while Khan sent reinforcements to Kerch garrison. Cossacks were repulsed in a stubborn battle, but many Turkish-Tatar troops were killed or wounded in process.^[1]

In early August, Cossacks captured Sudak and Kefe, plundering these cities.^[2] Throughout summer months, Cossacks dominated the Crimean coast. Several galley penal servitudes were sent from Istanbul against Cossacks, but they were defeated and captured in a boarding battle.^[1] On September 14, when "the whether was great in autumn and there were frequent winds on the sea", Cossacks returned from their campaign to the Don region.^[1]

Cossacks freed 225 Rus' captives and taken 400 Tatars captive. Cossacks suffered 30 killed during the campaign.^[1] Cossacks succeeded in their goal of delaying Tatar forces for two months, until mid-September.^[1][4] Tatars themselves were indecisive in their actions and for a long time didn't risk going beyond Perekop due to the fear of Cossack and Kalmyk attacks.^[1]