The United Nations peacekeeping operation in the Democratic Republic of Congo, the world’s largest, is in disarray after fighting in the country’s east has called into question efforts to rebuild the failed state.

The UN Security Council on Friday voted to renew the mandate of the 18,000-strong peacekeeping force for a year. The vote came just days after a government offensive supported by the UN against a dissident ethnic Tutsi general turned into a humiliating rout.