The Naval Special Warfare Development Group (NSWDG), abbreviated as DEVGRU (DEVelopment GRoUp)[note A] and commonly known as SEAL Team Six,[3][4] is the United States Navy component of the Joint Special Operations Command (JSOC). The unit is often referred to within JSOC as Task Force Blue.[4] DEVGRU is administratively supported by Naval Special Warfare Command and operationally commanded by JSOC. Most information concerning DEVGRU is designated as classified information, and details of its activities are not usually commented on by either the United States Department of Defense or the White House.[5] Despite the official name changes, "SEAL Team Six" remains the unit's widely recognized moniker.

DEVGRU and its Army and Air Force counterparts (Delta Force and 24th Special Tactics Squadron) are the U.S. military's primary Tier 1 special mission units tasked with performing the most complex, classified, and dangerous missions directed by the National Command Authority.[6][7] DEVGRU conducts various specialized missions such as counterterrorism, hostage rescue, special reconnaissance, and direct action (short-duration strikes or small-scale offensive actions), often against high-value targets.