Complex sentence: Passing abandoned wagons, dead men and animals, they had caught up with the Turkish rearguard by 12:00, but had to stop at the village of Suweileh to water their horses and wait for the rest of the brigade to catch up with them.
Split into simpler sentences: Passing abandoned wagons, dead men and animals, by 12:00 they had caught up with the Turkish rearguard. But they had to stop at the village of Suweileh, not only to water their horses, but to wait for the rest of the brigade to catch up with them.