Which is all the more amusing when you consider that the books establish Halsey knew nothing about the Spartan III's until Ghosts of Onyx. Also that the SIIIs were intended to be used soley as disposable super soldiers (which to be honest was fairly odd to me..but whatever), sent into situations that not even Spartan IIs would be risked on. Good enough to get the job done, not good enough to come back (except in a few cases). So the idea that there was a team of IIIs and IIs working together...on Reach, just baffles me.
That's why I don't have much faith in Bungie's next venture...especially considering they invalidate their own cannon.
To give you an example...Halo storywriter Joseph Staten wrote one Halo book called Contact Harvest. In it, it establishes that Harvest, the first human colony to be wiped out by the Covenant, somehow wasn't actually wiped out. Not only that..but Sgt. Johnson was there...and he's actually a Spartan I (Project Orion) and...yeah. Of course, the Halo CE manual, which I assume someone at Bungie wrote, stated that Harvest was completely wiped out...and that most of the ships sent to investigate were wiped out...so how were there any survivors?
Bungie did a fine job keeping the story solid through the first three games, but as enjoyable as Reach is, it's clear Bungie just wanted out and decided keeping any kind of continuity was pointless. That's a terrible message to their fans, but oh well.