12/27/2013: South Sudan government agreed to conditional truce.
12/23/2013: US military personnel deployed to assist in South Sudan evacuation.
12/22/2013: UNMISS partially evacuated staff from South Sudan.
04/29/2012: Sudan declared state of emergency on South Sudan border.
10/12/2011: Sudan adopted Islamic constitution.
08/30/2011: Sudan accused of war crimes.
07/09/2011: South Sudan officially recognized as an independent country.
01/22/2011: Sudan voters voted overwhelmingly in favor of succession.