However, they seem to have made peace with it fairly quickly; the "Dr. Halsey's personal journal" booklet which came with the Limited/Legendary editions of Halo: Reach and Halo: Contact Harvest contain a fair number of direct references to Halo Wars.
Executive Meddling: Why the game became a Halo title. The order to turn it into one was expected to speed up production, but actually pushed back development a full year, since it was more complicated than merely replacing all the units with Halo models.
Mark Worden (Iron Man) is the Brute Army Commander.
Throw It In: Graeme Devine, the lead writer, made an entire press guide for the planet Arcadia. Bungie's writer Joseph Staten liked it so much that he included a mention of Arcadia in Halo: Contact Harvest.
What Could Have Been: The control scheme was designed separately for an original property, yet undecided at the time. Microsoft was not confident about the sales of a new series as a console RTS, so they demanded for it to be a Halo game instead.
Incidentally, this game isWhat Could Have Been for the Halo series as a whole. It was originally planned as a strategy game when the game was still anticipated to arrive on Macs.