Complex sentence: To support the Hedjaz Arab attacks at Maan by diverting German and Ottoman attention away from Maan, Chetwode (commander of XX Corps) ordered Chaytor (commander of Anzac Mounted Division) to lead an attack on 18 April against Shunet Nimrin.
Split into simpler sentences: To support the Hedjaz Arab attacks at Maan, Chetwode tried diverting German and Ottoman attention. He ordered Chaytor (commander of Anzac Mounted Division) to lead an attack on 18 April against Shunet Nimrin.