[quote=@Sigma]
[@Hael] Question, when did the humans begin space travel and colonization?
[/quote]

You're the human. You tell me.

The only thing I have set in stone about humans is that Earth was once on the outskirts of Xim territory, until humans reached spacetravel and begin expanding out on their own. This angered the Xim as they saw it as a disruption of their territory, so after decades of poor diplomacy between the humans and Xim, it led to war. The war lasted 50 years, and a peace treaty was made 10 years ago.

Everything else is up to you.