@zn426
I like a person who comes up with solutions instead of telling a story
It's what the thread asked for, and I'm simply giving the solution used by outnumbered forces the world over. The US did it in the our War of Independence, the Boers did it against the English, the Viet Cong did it against the US, and the Taliban used the strategy a second time against the US. I can even point you to a Star Wars fanfiction that used much the same premise, although it featured a limited portion of the Empire vs. near-future earth militaries.
Every single one of those situations required some form of internal disunity by the bigger force for victory by the smaller. The US won independence with that premise, but the Boers lost because the English were united. The Viet Cong and Taliban eventually accomplished their goals because of significant disunity in the United States. That is why the US has not won a war since WW2-the goal is no longer to win the war, but to win hearts and minds and force the opponent to give up rather than being grinded into submission.
I would appreciate your feedback. The situations I described have to be assessed realistically.