Military operations in the Caspian Sea began in April 1918. In mid-April, the Baku Committee of Revolutionary Defence instructed the Caspian Flotilla throw Expeditionary Unit in the area of ??Petrovsk (now Makhachkala) and other items of Dagestan, Imam Gotsinsky gangs engaged. April 17 at 22 hours Detachment flotilla of ships as part of the gunboat "Ardahan" transports "Kazbek", "Anna Gukasova", "East", "Partizan" and "Dagestan" with the 36th Turkestan regiment, the Red Guards and the aircraft on board left in the sea. April 19 at 9:00 the court approached the tour and the Cape, making the exploration, went to the north. Not far from Cape Turali squad captured the enemy's ship, subsequently used for the transport of troops and expelled from Petrovsk reconnaissance boat "Ondine" the enemy, which was a white officer of the Dagestan Regiment. From the officer managed to get important information about the number of enemy forces that were in the Petrovsky.