system
Given the following post, respond as if you're commenting on Reddit:
human
[General] What is the largest army in Sci-Fi?

And second question:

Which Sci-Fi army is the most varied? (E.g., not a billion of the same species.)
gpt
The largest: i'm not familiar with 40K but i always hear how big everything is there. 

Most varied: Starfleet propably, although humans are the dominant race. (And don't come at me with *Starfleet isn't a military navy*, because they are)