You can find them in dusty, sunbaked badlands, moist tropical forests, and the salty spray of third-world littorals. Standing in judgement, buffeted by the rotor wash of a helicopter or sweltering beneath the relentless desert sun, they instruct, yell, and cajole as skinnier men playact under their watchful eyes. In many places, more than their particular brand of camouflage, better boots, and designer gear sets them apart. Their days are scented by stale sweat and gunpowder; their nights are spent in rustic locales or third-world bars. These men -- and they are mostly men -- belong to an exclusive military fraternity that traces its heritage back to the birth of the nation. Typically, they’ve spent the better part of a decade as more conventional soldiers, sailors, marines, or airmen before making the cut. They’ve probably been deployed overseas four to 10 times. The officers are generally approaching their mid-thirties; the enlisted men, their late twenties. They’ve had more schooling than most in the military. They’re likely to be married with a couple of kids. And day after day, they carry out shadowy missions over much of the planet: sometimes covert raids, more often hush-hush training exercises from Chad to Uganda, Bahrain to Saudi Arabia, Albania to Romania, Bangladesh to Sri Lanka, Belize to Uruguay. They belong to the Special Operations forces (SOF), America’s most elite troops -- Army Green Berets and Navy SEALs, among others -- and odds are, if you throw a dart at a world map or stop a spinning globe with your index finger and don’t hit water, they’ve been there sometime in 2015.