A single word of support: bombs. Hand to hand, face to face combat is exhilarating, but escalating to all out gas bombing holds great promise of a satisfactory conclusion to the campaign with minimal risk to friendly forces.
They really need to manufacture those with a pin I can pull with my teeth...for that "manly man" full out bug combat.
Also...boobie traps! They need to make trip-wire activated cans of bug-bombs! (need to be a little wire though!)