Complex sentence: After the encirclement, Vatutin and Stelmakh planned a bold operation to expand the Soviet offense westward even before elimination of Wehrmacht in the Stalingrad packet and to trap in another huge packet German armies, retreating from the Caucasus.
Split into simpler sentences: After the encirclement, Vatutin and Stelmakh planned a bold operation to expand the Soviet offense westward even before elimination of Wehrmacht in the Stalingrad packet. They intended to trap in another huge packet German armies, retreating from the Caucasus.