An assessment from an IISS analyst:
A revolutionary new UN combat brigade may have helped the Democratic Republic of the Congo (DRC) army to defeat a rebellion in the country’s troubled east. The rebel group M23 (March 23) declared this week that it was laying down its arms, bringing to an end an 18-month insurgency in which 80,000 have been displaced and thousands killed or injured.

However, there are dozens of armed groups in mineral-rich eastern DRC besides the Tutsi-led M23, and the Congolese government has now said that it will pursue others. A government spokesman pointed to the Rwandan-Hutu FDLR as a top priority.
Link:http://www.iiss.org/en/iiss%20voices...r-the-m23-447e

Sounds like a perpetual intervention, assuming the contributors remain committed, my emphasis:
It consists of 3,069 personnel from South Africa, Tanzania and Malawi, with two infantry battalions, one artillery company, and one special forces company. The brigade is also believed to have added two attack helicopters and four utility helicopters to MONUSCO’s existing aerial capabilities.