[quote=@Whisperer]
I am new at online roleplaying and I want to play this. Platoon size is roughly how many men? I could do an Antarctic country that specializes in technology with the downside of being terrible fighters and greedy for raw resources.

Random insult at GM, right?
[/quote]

Platoons are anywhere between 15-ish to 40-ish irl but I might hard cap it at around 30.
Can I ask what's with the Antarctic nation? This isn't a traditional NRP, its a squad base RP with roots of a NRP. There is not conquest victory and no raw resources to be gained. The only goal is to survive and try to find what the hell is going on at Endymion. This is also space-based not earth-based so unless you want your guys coming from an arctic planet, being an Antarctic nation makes no sense.
As for the insult part, go reread the OP and the rules.