A small percentage, estimated at less than 2 percent, of Navy SEALs are former Marines, since they are two different branches of the military. In order to become a Navy SEAL, candidates must be U.S. citizens, males betwe... More »

Navy SEAL candidates must be male U.S. citizens between the ages of 17 and 28, although waivers are made for qualified candidates 29 to 33 years old. Candidates must be enlisted in active duty service in the Navy, pass t... More »

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Navy SEALs perform a number of specialized warfare missions that fall outside the purview of regular military forces, including counterterrorism, guerrilla warfare, special surveillance and foreign national military trai... More »

Navy SEALs perform a number of specialized warfare missions that fall outside the purview of regular military forces, including counterterrorism, guerrilla warfare, special surveillance and foreign national military trai... More »

As of February 2015, there have never been any female Navy SEALs. A Navy SEAL must be male, 17 to 28 years old, a citizen of the United States and a high school graduate, among other physical screening, military service ... More »

Although Green Berets and Navy SEALs are both part of special operations forces trained for reconnaissance, fighting terrorism, unconventional warfare and combat search and rescue, the Green Berets are also trained in pe... More »

The Navy and the Marines are separate branches of the U.S. military. The Navy deals with control of the seas through attack, defense and transport of military equipment. The original purpose of the Marines was to capture... More »