(Newsweek) – On the morning of July 21, three women left a United Nations base on the outskirts of Juba, the capital of South Sudan, to buy food for their children. They are among thousands of people taking shelter in U.N. bases because of the country’s on-again, off-again conflict. They had heard stories of soldiers from the South Sudanese army raping women as they came back from similar shopping trips, so they hoped to return early enough to avoid trouble. But as they walked back from the market around noon, a group of uniformed soldiers with guns and knives stopped the women, beat them with rifle butts, seized their food and phones, and took them to a nearby walled compound.