hehe
i know this post is old but i can something to write here.
Am gun freak, i like weapons, special forces, tanks, bombs and guns.
i like
Special Air Service (SAS) - Britan
for they speed, percision and care of hostages
Specnaz - Russia
for they brutality, aggresive, solving problems fast and rapid fire - rapid killing tactic
USMC (Marines) - USA
for hard training, they drill instructors, best tehnology and invasion tactics
but one unit have all this and they dont exist any more today.
They was too brutal, too agresive unit, loyal to wrong ideas.
They were more mashines than humans:
Waffen SS - Germany
Part 1/5 of they history / documentary:
http://www.spikedhumor.com/articles/152994/Weaponology-Waffen-SS-1-5.html
allso on this page u can find other special forces units, just write
"Weaponology" in search, it is tv series who strip special forces weapons, history, people, equipment from start to present day.
enjoj