The Battle of Cambrai and the Hindenburg Line begins (see Oct. 5): the British attack in front of Cambrai, break through the Hindenburg defences, and capture Beaucamp, Graincourt, Bourlon Wood, and other important positions, with over 10,000 prisoners and 200 guns. The Argonne Front:--The Americans and French make further progress; the number of prisoners to date exceeds 23,000. Palestine Front:--Arab forces capture Deraa. Sept. 28 (Sat.) The Fourth Battle of Ypres: the Belgians attack from Dixmude to Ypres, the British from Ypres to Ploegsteert; very rapid progress is made by the Belgians, who capture the whole of Houthulst Forest; the British advance on their right beyond the furthest points reached by them in 1917. The Argonne Front:--The French capture Somme-Py and Maure; the Americans reach Brieulles and Exermont. Sept. 29 (Sun.) The British capture Messines and the Messines Ridge; Dixmude is occupied by the Belgians; the Allied front is carried to the neighbourhood of Roulers, Courtrai, and Menin, an important salient being thus driven into the enemy's northern front which endangers his positions on the Belgian coast: this ends the Fourth Battle of Ypres. Cambrai--St. Quentin Front:--The British, assisted by the 2nd American Corps, reach the outskirts of Cambrai and carry an important section of the Hindenburg defences between Cambrai and St. Quentin. In the Oise-Aisne area the French reach the line of the Ailette. Sept. 30 (Mon.) Serbia:--The Battle of the Vardar (see Sept. 15) ends in complete victory for the Allies; the French capture Uskub. An Armistice (signed on the previous day) comes into force between the Entente Powers and Bulgaria (see Appendix VI. (i)). Palestine Front:--Damascus is captured by British and Arab forces. Oct. 1 (Tues.) The resignation of Count Hertling, the German Imperial Chancellor, is announced (see Nov. 1, 1917). The French capture St. Quentin. The Argonne Front:--The French advance on a front of 14 miles and capture Vaux, Autry, Condé, and Binarville. Albania:--The Italians recapture Berat (see Aug. 26). Oct. 2 (Wed.) The British capture Ledeghem and cross the Lys between Werwicq and Comines. The British break through a further line of the enemy defences between Cambrai and St. Quentin. The Germans retreat rapidly between the Vesle and the Aisne, from Rheims westward. The Adriatic:--Italian and British naval forces attack Durazzo and destroy it as a naval base. Oct. 3 (Thur.) Prince Max of Baden succeeds Count Hertling as German Imperial Chancellor (see Nov. 9). Armentières is occupied by the British. The British attack on an eight-mile front north of St. Quentin and make progress. Oct. 4 (Fri.) A Note from the German Government to President Wilson proposes that peace negotiations should be opened on the basis of his 'fourteen points' (see Appendix V.). King Ferdinand of Bulgaria abdicates in favour of his son Prince Boris.