Can UN efforts prevent civil war in South Sudan?

The UN Security Council has urged an immediate halt to the fighting in South Sudan and renewed its peacekeeping mission, UNMISS, for another year. South Sudan has formally been at peace since a 2018 agreement ended a five-year civil war between forces loyal to President Salva Kiir and First Vice President Riek Machar. But recent tensions between Kiir and Machar threaten the fragile peace.