Complex sentence: In the meantime, the 4th Brigade was involved in bloody action along the Goch-Calcar road: the tanks and Kangaroo troop carriers were halted by the mud in which they got bogged down and by fire from hidden 88 mm guns along the road.
Split into simpler sentences: In the meantime, the 4th Brigade was involved in bloody action along the Goch-Calcar road. The tanks and Kangaroo troop carriers were bogged down by the mud and slowed by fire from hidden 88 mm guns along the road.