Marine Helo Insert To the far west the mountains and jungle are so rugged that moving by foot takes days to go miles. By use of helicopters troops can be inserted and withdrawn in quick time. Here a USMC helo inserts a long range patrol that will stay on the ground for a week and radio back target information. If all goes well they will be flown back to their base when there mission is complete. If not USMC or 1/61 troops may be air assaulted into the area to extract them.