“Wait wait wait.” Rico halted the squad. “We’ve flown millions of light-years across the galaxy to fight giant man-eviscerating insects; and we’re going in on foot?
The commander frowned. “So?”
“Where are all the tanks?”
“Tanks!” The commander slapped a hand to his forehead. “I knew we forgot something!”
Aside from the lack of tanks, I seem to remember the reporter guy saying that Klendathu is “an ugly planet, a bug planet, a planet hostile to life” (right before he gets munched). So if the planet’s so utterly useless, why not just nuke the thing from orbit?