April to 5 May. He was promoted to captain on 29 July. Lone Pine On 6 August 1915, the 1st Australian Brigade launched an assault on the impregnable Ottoman position at Lone Pine. Led by the 2nd, 3rd and 4th Battalions (with the 1st Battalion held in reserve), the attack was orchestrated to divert Turkish attention and reinforcements away from the primary operation to the north of the line as the British sought to capture the Sari Bair ridge. The Australian assault at Lone Pine commenced in the late afternoon just before sunset. An artillery barrage had preceded the attack, though according to historian Robin Prior the results had been "feeble" and the advance was hard-fought. Nonetheless, within half an hour the Australians had breached the Turkish trenches and seized their objectives. Despite the initial success, Australian casualties had been heavy and the 1st Battalion was ordered forward in preparation for the expected Turkish counter-attack. The battle descended into fierce fighting over the next three days, often in the form of what Bryan Perrett has described as "deadly bombing duels". At 09:00 on 9 August, the day after Shout's 33rd birthday, the 1st Battalion relieved the 3rd Battalion on the Lone Pine front at a position known as Sasse's Sap. Soon after, the Turks renewed their attack and recaptured a stretch of the sap. Determined to rout these men, and supported by a few of his own soldiers, Shout charged down one trench throwing bombs. He killed eight Turks, and managed to clear others to retake the trench. Meanwhile, Captain Cecil Sasse—Shout's former company commander—gathered three men with sandbags, and cleared another section of the sap. Armed with a rifle, Sasse had charged down the trench at the head of his men. His party soon discovered a group of Turks focused on, and firing in, a different direction; Sasse and his men killed 12 and forced the remainder to flee. Sasse continued to keep the Turks at bay with rifle fire as his men barricaded the trench with the sandbags. Sasse, described by official historian Charles Bean as "elated" by the achievement that morning, approached Shout with a proposal to repeat the feat. Shout agreed. The duo assembled a party of eight men this time to carry sandbags and extra bombs. Having reconnoitred the Turks' position, the previously erected barricade was shoved down and, side-by-side, Sasse and Shout ran forward.