After this a period of stalemate fell across the peninsula. In early June, the 15th Battalion, its strength having fallen to below 600 men, was withdrawn from Quinn's Post to recuperate in a quiet sector known as "Rest Gully". Over the next two months, due to illness, the battalion's personnel were almost completely replaced. It received several drafts of reinforcements, amounting to over 500 men, including its transport element, and by early August it had reached a strength of 720 men. On 6 August, the Allies launched an offensive in an effort to try to break the deadlock, during which the 15th Battalion attacked the Abdel Rahman Bair heights, which was known to the Australians as "Hill 971", before later supporting the 14th Battalion's attack on "Hill 60". Casualties were heavy, and on 13 September the battalion was withdrawn for a brief rest on Lemnos, its strength having fallen to just 11 officers and 136 other ranks. They returned to Gallipoli early in November, occupying a position in Hay Valley, as winter began. They remained there until being evacuated on 13 December on the transport "Carron", as part of the main Allied withdrawal. The battalion's casualties during the campaign amounted to 10 officers and 380 other ranks killed, and one officer and 17 other ranks captured.