A BTR-4 infantry fighting vehicle of the Ukrainian Army is seen here engaging a T-72B3M main battle tank and BRM-1K armored recon vehicle (based on BMP-1) of the Russian Army in Mariupol, Ukraine. The video shows the BTR-4's remote controlled weapon station (RCWS) firing its 30mm autocannon at the T-72B3M tank first, damaging it before disengaging. It then engaged the BRM-1K armored vehicle and destroyed it with the 30mm gun. Notice that the BTR-4 RCWS operator aimed at the lower hull of the BRM