The original was a tank battle fought between the 1st Panzer Group's III Army Corps and XLVIII Army Corps (Motorized) and five mechanized corps of the Soviet 5th Army and 6th Army in the triangle formed by the towns Dubno, Lutsk, and Brody between 23 and 30 June 1941.
It is known in Soviet historiography as a part of the "border defensive battles". Although the Red Army formations inflicted heavy losses on the German forces, they were outmanoeuvred and suffered enormous losses in tanks. Poor Soviet logistics, German air supremacy as well as a total breakdown in Red Army command and control ensured victory for the Wehrmacht despite overwhelming Red Army numerical and technological superiority.
This was one of the most intense armoured engagements in the opening phase of Operation Barbarossa and one of the largest tank battles of World War II.
Looks like it will be a corker!