Special forces and special operations forces are military units trained to conduct special operations. Special forces emerged in the early 20th century, with a significant growth in the field during the Second World War, when "every major army involved in the fighting" created formations devoted to special operations behind enemy lines. Here you'll see images of some of the most well trained, totally badass, and terrifying specials force units in the world. While you may find that you're familiar with some of these special units from your own country, chances are you'll learn a fun fact or two about far away fighting units from across the globe.
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