Repelling of a Russian assault with massed tanks by UAV operators of the 72nd Brigade's Bulava unit . It is noticeable that the Russians attacked through difficult terrain further fortified by engineering barriers: some tanks got bogged down in swampy terrain and hit mines. The Russian unit attacking was likely the 80th Tank Regiment of the 90th Tank Division of the Russian Armed Forces, whose combat vehicles advanced quite far through the grey area before being destroyed. The assault targeted villages Kotlyarivka and Bohdanivka in Donetsk oblast'