Hawa arrived at a refugee camp in Tawila, a town 35 miles from the city of El Fasher in Sudan's Darfur region, on Oct. 20 after being separated from her 16-year-old son. "We walked for days on rough terrain, our feet scorched," she said, in testimony shared with ABC News by U.S.-based nonprofit Avaaz, an online activist network. "When they carried out executions, that was the first time I saw someone slaughtered in front of me. It was traumatizing." Hawa is one of the thousands who have managed to flee El Fasher since a Sudanese paramilitary group, the Rapid Support Forces (RSF), seized the city last month. El Fasher, the capital of Sudan's North Darfur state, was the last major holdout in the wider western Darfur region, under total siege for more than 18 months before falling to the RSF.

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