Editing Det One (section)

{{Use dmy dates|date=August 2021}}
{{Infobox military unit
| unit_name                     = Marine Corps Special Operations Command Detachment One
| image                         = MCSOCOM Detachment One insignia.svg
| image_size                    = 200px
| caption                       = Marine Corps Special Operations Command Detachment One insignia
| dates                         = 20 June 2003–2006
| country                       = 
| allegiance                    = {{Flag|United States of America}}
| branch                        = {{Flag|United States Marine Corps}}
| type                          = [[Special forces|Special operations forces]]
| role                          = [[Air assault]]<br>[[Amphibious reconnaissance]]<br>[[Amphibious warfare]]<br>[[Anti-tank warfare]]<br>[[Artillery observer]]<br>[[Battlespace]]<br>[[Bomb disposal]]<br>[[CBRN defense]]<br>[[Clandestine operation]]<br>[[Close-quarters battle]]<br>[[Counter-sniper tactics]]<br>[[Counterterrorism]]<br>[[Desert warfare]]<br>[[Direct action (military)|Direct action]]<br>[[Forward air control]]<br>Hostage rescue<br>[[HUMINT]]<br>[[Intelligence assessment]]<br>[[Irregular warfare]]<br>[[Jungle warfare]]<br>[[Long-range penetration]]<br>[[Military intelligence]]<br>[[Mountain warfare]]<br>[[Naval boarding]]<br>[[Parachuting]]<br>[[Patrolling]]<br>[[Raid (military)|Raiding]]<br>[[Reconnaissance]]<br>[[SIGINT]]<br>[[Special operations]]<br>[[Special reconnaissance]]<br>[[Tactical communications]]<br>[[Tracking (hunting)|Tracking]]<br>[[Urban warfare]]
| size                          = 86
| command_structure             = [[US Special Operations Command]]
| garrison                      = [[Camp Pendleton]], [[California]], US
| ceremonial_chief              = 
| colonel_of_the_regiment       = Robert J. Coates
| nickname                      = 
| patron                        = 
| motto                         = 
| colors                        = 
| march                         = 
| mascot                        = 
| battles                       = [[Operation Iraqi Freedom]]
*[[Second Battle of Fallujah]]
| notable_commanders            = 
| anniversaries                 = 
| decorations                   = 
| battle_honours                = 
}}

The '''Marine Corps Special Operations Command Detachment One''', also simply known as '''Det One''', was a pilot marines special operations forces program of attaching a permanent unit of the [[United States Marine Corps]] (USMC) to the [[United States Special Operations Command]] (USSOCOM). It was commanded by Col. Robert J. Coates, former commanding officer of [[1st Force Reconnaissance Company]]. Det One was activated on 19 June 2003 and had its headquarters at Camp Del Mar Boat Basin in [[Camp Pendleton, California]]. It was disbanded in 2006 and succeeded by the permanent [[United States Marine Corps Forces Special Operations Command]] (MARSOC).