At 5:30 a.m. on 15 September, the French 122nd and 17th (Colonial) divisions struck Sokol, Dobro Pole, Kravitski Kamene and Kravitsa while the Serbian Shumadia Division assaulted Kamene and Veternik. The Greek Archipelago, 3rd and 4th divisions under Panagiotis Gargalidis acted as a link between the Serbian and French troops without entering combat. The offensive immediately caused a wave of mass desertion among the Bulgarian units; the remaining infantrymen and artillery squadrons were not able to hold their ground. During the course of the battle, the 122nd Division broke into two columns and suffered heavy casualties. The left column managed to reach a position located from Sokol at 6:30 a.m. and take the peak at the end of the day. At 4:00 p.m., the right column captured Dobro Pole after rushing a segment of steep terrain. The 17th Division seized Kravitsa at 7:00 a.m., suppressing the last signs of resistance.