 Complete the following phrase:  Both the federal and separatist armies have been widely criticized by human rights groups such as Amnesty International for alleged war crimes committed during the two Chechen wars, including accusations on both sides of rape, torture, looting, and the murder of civilians The Russian military has been repeatedly reported to have used vacuum bombs and bombed white-flag bearing civilian vessels see the Katyr-Yurt Massacre by international charity groups. Dozens of mass graves created by the Russian side containing hundreds of corpses have been uncovered since the beginning of the 