WW2 German Operation Barbarossa Tactical Map - June 22, 1941 - Kalvarija Lithuania Invasion - Field Used. Rare and historically significant original WW2 German tactical map used during the launch of Operation Barbarossa on June 22, 1941. This authentic military map documents the German Army Group North's assault into Lithuania, showing troop movements into Kalvarija, a key fortified position along the Molotov Line. Kalvarija, a key fortified position along the Molotov Line. This map is composed of multiple original map segments professionally glued together, forming a long continuous ...