<sod >THE HAGUE, Netherlands - Two former allies of the late Serbian President Slobodan Milosevic are going on trial for the second time in a United Nations court on charges of setting up and arming notorious Serb paramilitary gangs that committed atrocities in Bosnia and Croatia during the 1990s Balkan wars.< eod>< sod > THE HAGUE, Netherlands - Two former allies of the late Serbian President Slobodan Milosevic played key roles in facilitating atrocities by notorious Serb paramilitaries in Croatia and Bosnia as Belgrade tried to carve out an ethnically homogenous "Greater Serbia" during the bloody breakup of the former Yugoslavia, a prosecutor said Tuesday as the two men's United Nations retrial began.< eod>