 After the success of that offensive, clearly visible in the first days (from 13 July), Konstantin Rokossovsky’s started a serious push westwards in the Lublin-Brest area as well.On 18 July five armies of the 1st Belorussian Front (including one Polish army, the Polish First Army) deployed on the front’s left wing south of the Pinsk Marshes, struck and shattered the defenses of Army Group North Ukraine 4th Panzer Army west of Kovel.Within hours, the front’s 2nd Tank Army and several mobile corps began exploiting success to the west with the infantry following in their wake.