"I expect them arrive at any time. The challenge is now on the UN to implement and fulfill their promises," Lomuro said.
The unanimous decision by South Sudan's Cabinet ends a three-month limbo over whether the peacekeeping force could be increased and eliminates a potential showdown with the UN Security Council. South Sudan already has 12,000 UN peacekeepers.
The additional peacekeepers were ordered by the U.N. Security Council after fighting killed hundreds of people in the capital, Juba, in July, and set off fighting across the country.
Last week, US Ambassador to the UN Samantha Power said that South Sudan's unwillingness to allow the increased force to deploy was one of several ingredients that have created a "climate conducive to mass atrocities," in the troubled East African nation.
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She said the US would support an arms embargo on South Sudan and targeted sanctions on its political leaders, including a vocal critic of the regional force, Minister of Information Michael Makuei.
The peacekeepers already in South Sudan have been frequently criticized for failing to protect civilians, but the additional 4,000 troops from African nations will have a bolstered mandate to use force.
Recently the UN has warned that South Sudan is at risk of genocide. On November 10th, UN Chief Ban Ki-moon said that current "peacekeeping operations do not have the appropriate reach, manpower or capabilities to stop mass atrocities.
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