DEVGRU
Marcinko was selected by the Chief of Naval Operations Admiral Thomas B. Hayward, as the first commanding officer of this new unit. At the time, the Navy had only two SEAL teams. Marcinko purportedly named the unit SEAL Team Six in order to confuse other nations, specifically the Soviet Union, into believing that the United States had at least three other SEAL teams that they were unaware of. He personally selected the unit's members from across the U.S. Navy's SEAL Teams and Underwater Demolition Teams, including a special counter-terrorist tactics section of SEAL Team Two, codenamed MOB-6. SEAL Team Six would be the Navy's premier counter-terrorist and hostage rescue unit, like its Army counterpart Delta Force. While typically a two-year command in the Navy at the time, Marcinko commanded SEAL Team Six for three years, from August 1980 to July 1983.