Monash ordered a general advance, for which the 10th Brigade was assigned to the north of the
Bray–Corbie Road with its left flank anchored by the River Ancre, while the 11th Brigade would attack to the south of the road, with its right flank bounded by the River Somme. From the beginning, the attack went awry for the Australians. Inexperience in planning quickly in open warfare situations resulted in the two brigades largely planning in isolation, and this would prove costly. As the two brigades of field artillery – the British
189th and the Australian
7th – that were assigned to the 3rd Division were dislocated to the north of the Ancre, the assault would lack artillery support, with only limited, and largely long range, support being provided. Commencing around 3:40 pm, the
40th Battalion, from the 10th Brigade, began to move out of its positions around
Heilly station and moved towards the next crest. They were under orders to advance north of the Bray–Corbie Road in concert with the 11th Brigade's
41st Battalion, which would advance through the
43rd Battalion's position to the south of the road. Reaching their stepping off point, however, it became clear to the men of the 40th that the 41st Battalion had not been given the same timing. Nevertheless, the commanding officer of the 40th Battalion, Major
Leslie Payne, was determined to carry out his orders and as a result, at around 5:00 pm, the Tasmanians of the 40th Battalion began their advance towards positions held by elements of the German
1st Division, including the 1st Grenadier Regiment and the
13th Infantry Regiment. Moving through the centre of the Australian position they advanced into open ground with no flank protection, while what little artillery support they had had largely fell short. Coming up against heavy German machine gun and artillery fire, the 40th Battalion suffered heavy casualties – about 150 killed or wounded – and the advance came to a halt after only , essentially halfway through the first planned bound. Presently, it began to rain. The 11th Brigade's advanced elements subsequently stepped off around 5:45 pm, with several patrols of South Australians from the 43rd Battalion being pushed forward with a view to taking
Sailly-Laurette. Coming under intense fire, this patrol was able to slowly work its way forward over the course of just over an hour, and began establishing a line of outposts, but these were well short of the objective. The
42nd Battalion, a Queensland-recruited unit, also established several posts opposite the village. As dusk fell, the
39th Battalion moved north around the 40th and pushed the line forward on the Australian left, to conform with the 40th, and began to dig-in. Shortly afterwards, the 41st belatedly moved up on the 40th Battalion's right to join the line between the 40th Battalion and the outposts established by the 42nd and 43rd Battalions, thus establishing a contiguous line between the Ancre and the Somme. A renewed effort was ordered by Monash and after dark, the Australians made another attack. In the centre, they were held up by a German defensive position in a copse, while the flanking force from the
44th Battalion that had been dispatched to capture Sailly-Laurette was ambushed by several machine gun posts from the 3rd Grenadier Regiment and suffered heavy losses. The Western Australians from the 44th Battalion subsequently withdrew from the village, taking as many wounded with them as possible, as
Lewis gunners laid down covering fire. Despite continuing German machine gun fire, small parties were sent out throughout the night to bring wounded soldiers back to the Australian lines. Meanwhile, the Australians brought up artillery and as the rain fell on 29 March the guns began to attrite the German defences that had held up the infantry. Meanwhile, the infantrymen began digging-in along the new line that the occupied, while on the left of the 3rd Division's position, the Australians exploited a brief lull in the battle to carry out a reconnaissance of the spur that extended between the 35th Division's positions around
Treux and Morlancourt. A small skirmish was fought by a patrol of Victorians from the
38th Battalion – who, along with the
37th had assisted the 35th Division the day before around Treux and Marrett Wood during the First Battle of Dernancourt – around the northern end of the spur, which resulted in up to 30 Germans being killed and five members of the 13th Infantry Regiment (
13th Division) being captured. Following this, the Germans rotated their forces and on 30 March, troops from three German infantry regiments – the 31st, 85th and 86th – of the
18th Division launched a strong counter-attack, focused on the 11th Brigade's positions along the southern part of the Australian front. The 31st Infantry was assigned the role as the main assault unit, supported by two battalions from the 85th Infantry. The remaining battalion from the 85th Infantry concentrated against Sailly-le-Sec, with elements of the 86th, advancing across the Australians' front from Morlancourt, in support. The supporting artillery had only limited ammunition and its observation was obscured by sleet. In total, three attacks were made by the Germans throughout the day, but these were turned back by strong machine gun, rifle and artillery fire which inflicted heavy losses and repulsed the attackers before they could get within of the Australian positions. Australian casualties over the course of the battle amounted to over 450 killed or wounded, while the Australians initially estimated German casualties at around 500, with subsequent assessments rising to between 3,000 and 4,000 although the latter figures are now considered to be too high. ==Aftermath==