just a small question

in halo origins 2 cortana mention that the humans and covenant teamed up to fight thr flood then went back to fighting after that, did that really happen because i’ve heard some things in halo legends arnt canon.

Origins, both parts, is a summery of over 100,000 years of history condensed into a 30 minute episode. A lot of key details are skimmed over.

When it comes to the canon of Halo Legends, think of it this way: the events, for the most part, are canon. The visuals, with extremely rare exception, are not. Also, Odd One Out is non-canon (and absolutely terrible, IMO).