SAKE, Congo — Congo’s president has suspended the army’s chief of staff, following the publication of a United Nations report that reveals that General Gabriel Amisi oversaw a criminal network selling arms to rebels in the country’s troubled east.

The firing of the general indicates that Congo is finally getting tough on its notoriously dysfunctional and internally divided army. It comes as an eight-month-old rebel group pushed beyond Goma, the bustling regional capital of eastern Congo, which fell to the fighters earlier this week.