system
Given the following post, respond as if you're commenting on Reddit:
human
[Halo/Star Trek/Mass Effect] The Enterprise and the UNSC Infinity appear just before the Battle of Earth in ME3, do they intervene?

What's the Federation's and the UNSC's protocol when appearing in an obviously alternate universe where humanity is fighting off a bunch of ancient alien robots? Do they intervene or float away?
gpt
In regards to the Federation, it depends on which Enterprise shows up.  The Infinity would most likely jump into the fray just on principle given what the UNSC crew has experienced with their own Earth.