The British began to extend its front southwards taking over from the French, first to St.Quentin and then by the end of the month to Barisis. Field Marshall Haig now had 125 miles to defend with 57 divisions, but these were much weaker than before. Intelligence estimated that Germans were transferring between 30 to 40 divisions from the now quiet east over the winter, so for Haig the question was how to distribute his forces against the expected attack. With the Americans still slowly arriving it made sense that if the Germans were to attack it would be sooner than later, probably in early March. Although the weather had been bad for flying and for observation, British airmen had brought in photographs of numerous new aerodromes, dumps, railway sidings and hospital camps in the region opposite the British 3rd and 5th Armies from Arras to Peronne. But similar reports were coming in opposite the British 2nd Army on the Lys, and also on the French front in Champagne near Rheims.