User blog comment:James12708/Reapers VS. Forerunners VS. Angels from Darksiders VS. Humanity from Halo VS. Council and humanity from Mass Effect VS. Imperium of Man/@comment-50.80.96.33-20130222044555/@comment-1683193-20130222060343

Also Forerunner ground wars are mainly fought with things like War Sphinxes which can wipe out entire Reaper armies. Infantry