At the time of the battle, the Gallipoli Campaign had raged on two fronts – Anzac and Helles – for three months since the Allied land invasion of 25 April 1915. With the Anzac front locked in a tense stalemate, the Allies had attempted to carry the offensive on the Helles battlefield – at enormous cost and for little gain. In August, the British command proposed a new operation to reinvigorate the campaign by capturing the Sari Bair ridge, the high ground that dominated the middle of the Gallipoli peninsula above the Anzac landing.