Complex sentence: Thankfully a number of officers and men of the 33rd, along with one officer from the Royal Engineers, parted from the main force, reached the Abyssian defences, then climbed a cliff, forcing their way over a wall and through a thorny hedge.
Split into simpler sentences: Thankfully a number of officers and men of the 33rd, along with an officer from the Royal Engineers, parted from the main force and reached the Abyssian defences. They climbed a cliff face, forcing their way over a wall and through a thorny hedge.