Complex sentence: Dallas ordered the attack to begin at 11:45 on Ali Muntar by the 160th (Welsh Border) Brigade which advanced to attack their objective along the Es Sire Ridge, while the 158th (North Wales) which advanced from Mansura, also attacked Ali Muntar.
Split into simpler sentences: Dallas ordered the attack to begin at 11:45 on Ali Muntar by the 158th (North Wales) and the 160th (Welsh Border) Brigades. The 160th (Welsh Border) Brigade approached Ali Muntar along the Es Sire Ridge while the 158th (North Wales) advanced from Mansura to also attack Ali Muntar.