World War I, The Balkan front, 1918

At Salonika the Allies' politically ambitious but militarily ineffective commander in chief, General Sarrail, was replaced at the end of 1917 by General Guillaumat, who was in turn succeeded in July 1918 by General L.-F.-F. Franchet d'Esperey, who launched a major offensive in September with six Serbian and two French divisions against a seven-mile front held by only one Bulgarian