My money is on an internal uprising, not an invasion.
If you are serious about getting this published, do yourself a favor -- pay a junior high English teacher to proofread it and make necessary spelling and grammatical corrections/additions/deletions. You will have a more polished product and some unappreciated English teacher will love you for valuing her skills.
What did I miss?
I spell check in my word processor, onlything mispelled is on purpose, "gooberment" etc. Unless I missed something else. I will check better.