 On 21 March 1918 , the German Army launched its Spring Offensive in a last @-@ ditched effort to win the war , unleashing 63 divisions over a 70 @-@ mile ( 110 km ) front . As the Allies fell back the 3rd and 4th Divisions were rushed south to Amiens on the Somme . The offensive lasted for the next five months and all five AIF divisions in France were engaged in the attempt to stem the tide . By late May the Germans had pushed to within 50 miles ( 80 km ) of Paris . During this time the Australians fought at Dernacourt , Morlancourt , Villers @-@ Bretonneux , Hangard Wood , Hazebrouck , and Hamel . At Hamel the commander of the Australian Corps , Monash , successfully used combined arms — including aircraft , artillery and armour — in an attack for the first time . 
