User blog comment:Word Bearer333/Best Space Marine Legion?/@comment-50.83.1.9-20140507235630

Iron Warriors.Sheer size, 150,000-180,000 space marines combined with massive reserves of armored vehicles and ammunition supplies equal to several other legions put together coupled with vastly superior technology and a willingness to take victory at any price means that they can take loses that would cause other legions to quit the field. They aren't just siege troops, they're masters of armored warfare who are capable of being just as brutal in close combat as the Blood Angels or the World Eaters. Against the smurfs, they attack with combined arms, get pinned down by artillery fire that would make the Western Front look like amateur hour, get outflanked and crushed by more tanks than the Battle of Kursk and then cut to pieces in close quarters with a ferocity equal to any son of Angron.