Complex sentence: The transport aircraft were divided into four groups, each taking off from a different airfield in the Carolinas, with two groups dropping paratroopers and two towing gliders, and between them deployed 4,800 airborne troops in the first wave.
Split into simpler sentences: The transport aircraft were divided into four groups, two of which carried paratroopers while the other two towed gliders. Each group took off from a different airfield in the Carolinas, between them deploying 4,800 troops in the first wave.