system
Given the following post, respond as if you're commenting on Reddit:
human
[Halo: Reach] Say Emile did manage to hold off the Covenant forces so Noble 6 could escape, what happens differently in the master chief trilogy?
gpt
Not much. Master Chief made it through everything on his own too, and made the difference. Remember that there were more Spartan IIs alive than Master chief too. Noble 6 was hardly the only surviving Spartan III, either.  
Not much use for them in space combat, but they did perform a lot of infiltration and sabotage after we lost the Battle for Earth, before  the portal to the Ark was discovered.