Complex sentence: Wilkie 1924, p.128 By 17:15 all the wounded had been evacuated and the covering patrols recalled and as there were no water supplies at Rafa, at 18:30 the brigade was ordered to withdraw back to Sheikh Zowaiid.
Split into simpler sentences: Wilkie 1924, p.128 By 17:15 all the wounded had been evacuated and the covering patrols recalled. As there were no water supplies at Rafa, at 18:30 the brigade was ordered to withdraw back to Sheikh Zowaiid.