In the final "level" of Halo: Reach, Lone Wolf, Noble Six is fighting, supposedly in/around the breaking yards. Around him (/her) there are many dead marines. Now, where did they all come from? I get that there are many dead military personnel on Reach, but is there a (preferably canon) explanation for who these dead marines are, where they came from, and how Noble comes to fight his last battle among their bodies?
Looks like people on the 'net have asked/theorized about this...
The team's mission is unknown, but it can be assumed that they were deployed to fend off the Covenant attack on the Aszod territory near the ship breaking facilities. SPARTAN-B312 discovered the bodies of thirteen members of the team during the closing stages of the Fall of Reach. It is possible, though unlikely, that some members survived, as the team's composition is unknown. The team may have included all or part of either Echo or Gauntlet teams, or both, as both teams were present on Reach during the invasion.
These SPARTANs may or may not also be any members of SPARTAN-RED team that was split into four smaller teams (Alpha, Beta, Gamma, and Delta). Any one of the missing SPARTANs from these teams could be any one of these dead SPARTANs. Another possibility is that those Spartans were, as Noble Six, survivors of other squads, and reunited there to fight to the end for Reach.
Thirteen dead Spartans can be found around the level Lone Wolf.
The bodies are those of presumedly SPARTAN-IIIs and are scattered around the landscape. Their armor is randomized, with different configurations and genders every time the level is loaded. The fact that there are thirteen of them may be a reference to the number seven, as at the end of his/her last stand Noble Six becomes the fourteenth dead Spartan in the area.
The Spartans' mission is unknown. They were assumedly deployed to fend off the Covenant attack on the Aszod territory near the ship breaking facilities. The team may have included all or part of Red, Gauntlet and/or Echo teams, as all three teams were present on Reach during the invasion.