United Nations
The UN says 600 people have been killed in clashes in South Sudan.
Sources: New York Times
Sources: New York Times
Gunmen kill 12 United Nations peacekeepers and civilian staff in an ambush in Jonglei, South Sudan.
South Sudan appoints Francis Deng as its first ambassador to the United Nations.
The United Nations says 120,000 people in South Sudan required aid amid tribal fighting.
South Sudan is admitted to the United Nations, the first new member since 2006.