So I’ve looked around for like a week looking for the actual experience needed and the experience everything gives. I know it takes a marine a full (rebel) base to get 2 stars, and 1 rebel building to get 1 star. Takes a tank a full base and a little bit of the next one to a star, and the same thing goes for a spartan getting two.

I found this…

But I’m pretty sure it is outdated. I heard something about there being tiers, not related to reactors. Support?