Four years into South Sudan's devastating civil war, the world's youngest nation is reeling from sexual violence on a "massive scale," a new Amnesty International report says. The report is based on interviews with 168 victims of sexual violence in South Sudan and in refugee camps in neighboring Uganda, home to the world's fastest-growing refugee crisis. "Some of the attacks appear designed to terrorize, degrade and shame the victims, and in some cases to stop men from rival political groups from procreating," Wanyeki says. "If a survivor is left unsupported or untreated, he or she may develop more serious mental health problems," says Aladin Borja, coordinator for the national mental health and psychosocial support group for the International Organization for Migration. South Sudan's government has condemned sexual assaults, promising that "the government is moving swiftly to protect civilians from such behavior by educating all armed forces and holding perpetrators accountable," acting government spokesman Choul Laam told the AP.