Armen Gasparyan. DeNACification of Ukraine (№ 437148)

Of course, at first, the Soviet government underestimated the OUN-UPA factor. <...> Sobering up came pretty quickly. To do this, it was necessary to suffer a really serious loss, which the whole country would mourn. The fighting of Ukrainian nationalists attacked the convoy, which was accompanied by soldiers of the Red Army, led by the commander of the First Ukrainian Front, General Vatutin. A battle began, during which the commander was seriously wounded, costing him his life. <...> After the shake-up that Moscow gave to the local authorities for the death of Vatutin, they decided to fight the OUN-UPA seriously. Large gangs were defeated by the spring of 1945. What is meant by "big gang"? This is a formation of about 300 people. In 1944, as a result of special operations, including with the participation of army units, 57,000 OUN-UPA fighters were destroyed.