User blog comment:Tierhalibelbrylle/RWBY X Red vs Blue/@comment-4197234-20140529033743/@comment-3146930-20140603094441

It makes sense from a Halo standpoint. RvB has made mention before of events in the Halo series and they all have the same armor, so they at least exist in the same universe.

Then the the Forerunner series of books, it is discovered that humans had found Precursor technology, including these huge space stations around certain planets. These space stations were able to at the very least, withstand direct attacks from the Halos when they fired (even if they were heavily damaged, but they still lived). So if a large enough population of humans were on one of these stations when the Halos wiped out all sentient like in the galaxy, there is a chance that they survived and colonized a nearby planet.