At 5.30am a German bombardment fell on all the villages in the area of Villers-Bretonneux southwards as well as the front line itself signalling an imminent attack. At 7am the whole German line was seen to advance – a resumption of the offensive across a 21 mile front now that the German engineers had laid new railway lines enabling artillery and ammunition to be brought forward – and with the S.O.S. flare fired the British barrage fell upon the advancing infantry and combined with an intense rifle fire sent them to ground. However on the 35th Battalion’s left flank the Germans had broken through the British 14th Division on the north of the Roman Road and began to appear in their rear.
By 11.35am the troops of the AIF 3rd Division north of the Somme spotted German infantry entering the village of Hamel, but although British infantry were retreating the Cavalry in the area performed well to help secure a new defensive position to the north-east of Villers-Bretonneux up to Hill 104 which commanded observation both east over the Germans and west to Amiens. In the afternoon the Germans broke through the British to the south of the 9th Brigade. This event caused consternation at headquarters and the 36th Battalion was ordered to counter-attack. Moving at a jog-trot the 36th quickly passed the crest of the hill and came in view of the advancing Germans, who at once hesitated and turned back into the wood. Meanwhile on the Roman road the 33rd Battalion leapt at the chance of counter-attacking with the Cavalry with their swords and lances drawn, while at the same time three cars of a Canadian motor machine-gun battery lent by the IX Corps roared into action.
The German offensive of the 4th April, though it had failed in its objective, had driven back the British Fourth Army on its whole front and at some points for nearly two miles. To the south the French had too been forced back but with reinforcements arriving the danger was probably less than at Villers-Bretonneux. The defence of Villers-Bretonneux predominately by the 3rd Cavalry Division and the 9th Brigade, who lost 30 officers and 635 men during this period, had a major influence on the outcome of the spring campaign in this area. A continuous line, albeit a thin one had been re-established north as well as south of the railway. Meanwhile the 5th Brigade having just arrived from Flanders with the rest of the AIF 2nd Division was detached from its sister brigades and assigned to hold the reserve line (known as the Aubigny Line) behind the northern flank of the Fourth Army and with the 8th Brigade now also in reserve General Rawlinson was feeling happier about keeping the Germans out of Amiens.