The Germans then turned to their next operation, code-named Schwarz, and attacked the Montenegrin Chetniks. Đurišić appears to have suggested to Mihailović a short-term cooperation with the Germans against the Partisans, something Mihailović refused to condone. Đurišić ended up defending his headquarters at Kolašin against the Partisans. On 14 May, the Germans entered Kolašin and captured Đurišić, while Mihailović escaped.