All of my knowledge on this matter I defer to Heroes of Might and Magic:\n\nFew	1-4\n\nSeveral 5-9\n\nPack	10-19\n\nLots	20-49\n\nHorde	50-99\n\nThrong	100-249\n\nSwarm	250-499\n\nZounds	500-999\n\nLegion	1000+