there was a program over in england where a navy seal, pathfinder and US marine tried to track down an ex SAS soldier in a south american jungle. I have got to say the the SAS guy was on his own with minium gear and the yanks had gps and the lot. The americans never even got a stiff of him until they walked into a couple of his boobie traps. Then the navy seal had to be taken out due to heat exhaustion and the pathfinder got the other two lost. Big armies and whatever dont always mean good armies and the best trained forces on earth are the HM Forces. Please feel free to argue, just check the records.