Master chief and linda are defending the poa when noble team arrives (on the last level), they are waiting for any remaining spartans on the planet to get there so they can go o halseys mission, but it would seem the rest of red team is dead (as far as they can tell) In the ensuing battle linda gets severely injured. Emile gets killed in the mac cannon. Chief offers to man the cannon so the poa can escape but noble six convinces him otherwise, stating how cortana chose him (chief) for a reason. Chief carries linda on board and salutes noble six as he flies off in keyes' pelican, although he is not happy with leaving him there.
Other than that, red and blue team were fighting on and off planet for the full 2 weeks of the main invasion as cited in Halo: Reach. But the beginning of the 2 weeks are just like the are in the books, its just people die over a 2 week period instead of a day.
[Edited on 02.03.2011 7:30 PM PST]