The clear weather that prevailed along the Somme front at this time encouraged German, French, and British airmen to engage in raiding expeditions. On November 24, 1916, British machines attacked and routed a formation of twenty German aeroplanes, and held possession of the field without losing one machine. At other points the British flyers smashed eight German machines and drove several down to earth in a damaged condition. In these encounters the British lost three aircraft of various types. In Lorraine three British aeroplanes fought an engagement with a considerable number of German machines. The result was that the British drove down an enemy machine in the forest of Gremecy, remaining masters of the field without incurring any losses themselves. On the Somme front there was incessant activity among the French airmen, who fought about forty engagements, during which they brought down five German machines. Quartermaster Sergeant Flachaire destroyed his sixth machine near Manancourt and Lieutenant Doullin his tenth south of Vaux Wood. CHAPTER XIII WEATHER CONDITIONS--MOVEMENTS AROUND LOOS November, 1916, the fifth month of the Battle of the Somme, drew to an end with fog and drizzling rain, the whole fighting area a drab expanse of mud and pools of water. For two months there had not been an interval of more than three or four days of fine weather at a time, and the ground had grown steadily more and more water-logged, which greatly hampered military operations. Except on the Ancre, where the British had taken 7,000 prisoners, no other important victories had been won by them, but each day marked some gain, and in the aggregate the ground won, the casualties inflicted, and the slow but continuous attrition of the enemy were of importance. The British claimed that in November alone they had taken prisoner between 9,000 and 10,000 Germans and had put out of action fully four times as many. The wastage of the Allies' aircraft in November, 1916, was considerably less than in any of the previous four months. In the official reports it was definitely stated that 148 British, German, and French machines had been brought down. Of this total thirty-two British machines were admitted by General Headquarters to have been lost or were counted missing. As an offset to these losses the British airmen had destroyed twenty-four, captured seven, and brought down damaged twenty-six German machines. In addition to these the Royal Naval Air Service operating under French military authorities had brought down five hostile aeroplanes.