1689, Ukraine was involved in the preparation of the second Crimean campaign. On April 24, 1689, 112,000 Russian riflemen and 50,000 Ukrainian Cossacks (including S. Zabila's Nizhyn Regiment) under the command of Vasyl Golitsyn and I. Mazepa again marched on the Crimean Khanate. On August 10, 1689, the large Ukrainian embassy of I. Mazepa arrived in Moscow. It is well known that among the Ukrainian government officials accompanying the hetman was Nizhyn Colonel S. Zabila. After the beginning of 1694, his name is no longer mentioned in the historical literature. Fr. During the campaign, the Cossacks deal a devastating blow to the Budzha horde, capture the fortress of Hinkushli and release a number of prisoners. Among the captured trophies, historians mention 10 guns. Nizhyn Regiment (1700-1709) In the autumn of 1700, by order of Peter I, Hetman I. Mazepa sent a corps of Cossacks to the Baltics to help the Moscow army, which had entered the war with the Kingdom of Sweden. Colonel Ivan Obidovsky of Nizhyn was appointed hetman of the Cossack troops of the Poltava, Kyiv, and Nizhyn regiments. "Mazepa, entrusting his nephew with a large Cossack unit, clearly contributed to his hardening, maturing, gaining experience in the difficult conditions of war. But regiments of 7,290 soldiers arrived in Narva late. " On November 19, the Russians suffered a crushing defeat at the hands of the Swedish army led by Charles XII. The appearance of I. Obidovsky's corps in the Baltics, the unexpected raids of the Ukrainian Cossacks deep into the territory of the Swedes forced Charles XII to place troops in the border fortresses and to live in constant anticipation of the attack. After long meetings, the Swedish command decided to conduct a punitive expedition against the Cossack troops from Ukraine. However, General Klipsler's 4,000-strong corps approached Gdov and did not dare to storm the city, as there were many defenders in it. Due to the failures of the war with the Swedes, relations between Mazepa and Sich also worsened. Thus, in June 1705, the hetman sent several hundred Nizhyn regiments to the Duma deacon Omelyan Ukrainets with an order to "tame those Zaporozhian dogs." Nizhyn residents arrived in Zaporizhia, but fate saved them from the shedding of fraternal blood. The fact is that Peter I decided not to anger the Cossacks in such difficult conditions and ordered to pay them a salary. After that, the Nizhyn