Halo: all 12 Rings 2 Arks countless Sheild worlds, star roads autonomous fleets precursors,ancient san'shyum,human,and forerunners Not mentioning flood and Human/Covenant war era because the is the precursors' dust that has corrupted and soured of a millennia and just going off a timeline where the flood was not involved and the forerunners never tried to seize the mantle of responsibility