Colonel Oleksandr Makhachok, call sign "Chekh," was killed on May 30, 2022, in the Luhansk region while organizing the evacuation of his subordinates during an artillery shelling. A shell directly hit his dugout, resulting in his death. He was posthumously awarded the title Hero of Ukraine.

Makhachok was born in Radekhiv, Lviv region, and dedicated his life to military service and defending Ukraine. He participated in the ATO since 2014 and, with the full-scale invasion, helped organize defenses in Kyiv region, including engineering obstacles and mining. After the enemy retreated from the capital, he moved to eastern Ukraine.