If you're having a hard time fighting, just pick up a few extra people to be pawns. I picked up the Sheik, the Jew, and some random other people to be a bomber and to take front line damage.
Game glitched on me and I lost everything. I had max workers. 1 Collector, 3 Maxed out machine gunners and the rest were max Hammerers. When I purchased the 3rd machine gunner, the game froze and I lost everything. >:O