 The main rivers are the Somme and its tributaries (Avre, Ancre and Noye, the Authie) as well as the Bresle.At the beginning of the First World War, during the Race to the Sea of September and November 1914, the Somme became the site of the Battle of Albert.The battle was a five-day engagement between 25 and 29 September, with the French Tenth Army attacking at Albert and pushing toward Bapaume, and the German Sixth Army counter-attacking back towards Albert.