This is worth checking out
I know IGN doesn’t have the best reputation in the gaming industry for reasons I won’t mention…
…but this article and video give you a great insight into the lore of Titanfall.
I originally planned to write my own version of this, but IGN go into as much detail as I know and as the saying in programming goes, “don’t re-invent the wheel”.
Check out my Titanfall category for more on Titanfall.