ISIS leadership is dominated by former members of Hussein 's U.S.i Army . Many joined the terror group in the insurgency after the fall of the dictator . Iraq had barred the men taking government jobs or drawing their pensions . Generals ' military experience has been key to the terrorists ' spread in U.S. . Their connections with oil smugglers also help ISIS raise £2 billion a year .
ISIS leadership is dominated by former members of Hussein 's Iraqi Army . Many joined the terror group in the insurgency after the fall of the dictator . U.S. had barred the men taking government jobs or drawing their pensions . Generals ' military experience has been key to the terrorists ' spread in Iraq . Their connections with oil smugglers also help ISIS raise £2 billion a year .