Chetnik concentrations were detected on the eastern bank of the Neretva. Consequently, the plans had to be revised, and tough decisions had to be made. Weiss 2 Based on the gathered intelligence, German command concluded that Livno was the center of the southeastern half of the Partisan territory. For that reason, Weiss 2 had been conceived as a concentric attack on Livno, with the assumption that the Partisans would be pushed back, encircled and destroyed there. In the meantime, the situation had changed. The Partisans broke into the Neretva valley, and their main concentration was now between Prozor and Konjic. In spite of this, German command largely proceeded with the original plan. In light of the recent developments, however, first one (718th), and after a week another (717th) division were directed towards the new flashpoint. Two divisions, the 7th SS and the 369th, were used for the Weiss 2 operation. Their advance commenced on 25 February. The route assigned to the 7th SS Division was from Bosanski Petrovac, over Drvar and Bosansko Grahovo to Livno, while the 369th Division had to cover the route from Mrkonjić-Grad over Mliništa and Glamoč to Livno. In front of them stood six (out of ten) brigades of the Partisan 1st Bosnian Corps. The plan of the Corps Headquarters did not call for decisive defense. The units would put up just enough resistance to allow the units and the population to be evacuated, and would thereafter merely evade the German advancing columns. The 7th SS division captured Drvar on 28 February, and continued towards Grahovo, pushing back the 8th, 9th and 10th Krajina Brigades. On the road to Glamoč, the 4th and 7th Krajina Brigades were slowing down the 369th Division. As the 7th SS Division reached Grahovo, and the 369th, Glamoč, on 2 March, the Corps Headquarters decided to perform the evasion maneuver, and the brigades, together with a mass of the refugees, commenced their march over Šator Mountain towards Rore, and back to the Krajina. The freezing weather and deep snow meant this march over the high mountain area cost many civilian lives. The Germans invested large efforts in pursuing the Partisans through the mountain, but the Partisans remained elusive, and the only result was the capture of a number of exhausted refugees. After this maneuver, all the units of the 1st Bosnia Corps found themselves out of reach of the advancing Germans,