On March 25th, the enemy again attacked the positions of the 63rd Infantry Regiment on Hill 1050, but were repulsed. After another quiet period the offensive was to be resumed in April, and this time the British were to deliver the attack. General Sarrail wanted them to advance simultaneously on Serres and Doiran, but General Milne replied that with his weak effectives he could not attempt an offensive on both sectors, and he decided to limit himself to the Doiran front. He probably realized that General Sarrail wanted him to attack Serres solely for political reasons, because Serres, being a place which even the ordinary public had heard of, its capture would have been a good advertisement for the Armée d’Orient, but if the capture of the town appeared fairly easy, it would have been very difficult to hold it, as it was dominated by formidable Bulgarian positions on the hills behind it. On April 25th the British attack was launched. The immediate objective was the capture of the Grand and Petit Couronné, extremely strong positions defending the passage between Lake Doiran and the Vardar. Their capture would have opened two roads, that of the Vardar Valley with the railway along the river, and that of the Kosturino Pass towards Strumitza and the interior of Bulgaria. This sector of the front was, like that of the Cerna loop and that of Hill 1248, similar to the fronts of Italy and France, inasmuch as it was provided with all the defensive systems known to modern warfare, and the lines of the two adversaries were very close together, but it differed from the European fronts as all the sectors of Macedonia differed from them, owing to the far greater difficulties of supply and communications. Between Lake Doiran and the Vardar the 22nd and 26th Divisions were distributed (XII Corps), and they had held that sector for almost a year. The ground was extremely broken, and if the mountains occupied by the enemy were not very high, they dominated the British positions and were very well adapted for a strenuous defence. The most conspicuous point of the British position was a long hill like a hump, which the French had named La Tortue, on account of its resemblance to the back of a tortoise. The British trenches lay along the ridge on La Tortue, beside which rose the Petit Couronné of about the same height, which was the principal bastion of the first line defences of the Bulgarians. Between the two heights there was a deep gully, known as the Ravin des Jumeaux. Behind La Tortue were other hills, all dominated by the two formidable positions of the Grand Couronné near the lake, and the P ridges, the former 600 m. above the sea, and the highest point of the latter (P 2), 700 m.