Complex sentence: Germany moved 40,000 SS soldiers under Gottlob Berger to suppress the uprising, which detained and disarmed two Slovak divisions and 20,000 soldiers that had been supposed to secure the mountain passes to help the Red Army.
Split into simpler sentences: Germany moved 40,000 SS soldiers under Gottlob Berger to suppress the uprising. They detained and disarmed two Slovak divisions and 20,000 soldiers that had been supposed to secure the mountain passes to help the Red Army.