In June, the seaplane carrier arrived and the Allied air effort increased from a squadron to No. 3 Wing RNAS. The 52nd (Lowland) Division also landed at Helles in preparation for the Battle of Gully Ravine, which began on 28 June and achieved a local success, which advanced the British line along the left (Aegean) flank of the battlefield. Sanders credited the defence to two Ottoman officers, Faik Pasa and Albay Refet. On 30 June, the French commander, Henri Gouraud who had earlier replaced Albert d'Amade, was wounded and replaced by his divisional commander, Maurice Bailloud. Between 1 and 5 July, the Ottomans counter-attacked the new British line several times but failed to regain the lost ground. Ottoman casualties for the period were estimated at On 12 July, two fresh brigades from the 52nd Division attacked at the centre of the line along Achi Baba Nullah (Bloody Valley), gained very little ground and lost out of the Royal Naval Division had and French losses were Ottoman losses were about and .