Tamra B. Orr 
USMC Reconnaissance Battalions [PDF ebook] 

Marine Corps Reconnaissance Battalions sneak into hostile enemy territory in order to observe close-up what is happening, who is operating where, how many enemy forces there are, and where they may be most vulnerable. This information is used to design combat strategies. Readers of this book get the opportunity to slip behind enemy lines with these courageous Marines who, at enormous personal risk, collect information that may very well determine the outcome of a battle and the course of a war.