Triplepost: Here's some information for clarity on the backstory, just core facts.
- Faster-than-light transportation was discovered around 2070, hooray theoretical physics turning out to work. Colonization both inside and outside of the solar system immediately ensued.
-English is still the primary languages, although asian languages are still spoken. The Earth had a unified government prior to the initial alien attack, and english was the primary language worldwide.
- Cybernetics are very highly controlled, and for the most part illegal. The first instances of such technology surfaced around 2150, although it's not exactly clear when they first were created, or who made them.
- Most combat between humanity and Them take place in space, although ground combat is still quite common, as They are prefectly content to land and level colonies as they see fit.
- Military service is mandatory, but it's more of a national-guard-esque thing, where all able-bodied men are required to do a year of training and serve as defense forces for their respective colonies, essentially as part of their schooling, at the age of 21. All extraplanetary combat, ie offensives, are done by voulenteers. Joining the military isn't just something for people who are suicidal, either, it's a completely legitimate way to earn a living, as you get paid, and in addition all your basic needs are provided for while in the service.
- 97% of people don't own their own space vessels, you'd either have to be in the business of transporting goods or people, be a smuggler or pirate, or be in the military.
Edit: Mirrored on the front page
