If my boys were to rewrite history, there would be less yawning and much more drama.
Maybe the heavy artillery is required because there's gold in there? Who knows what kind of treasure is being safeguarded? If I ask the boys, it seems that the answer changes each time or they suddenly don't remember (which is code for: "Hey mom, will you stop asking us these questions and just let us play?").
For the record: I'd hate to be the soldier that has the dinosaur doodoo duty.