Merrill's Marauders

5307th Composite Unit (provisional)
Shoulder sleeve insignia (SSI) of the 5307th Composite Unit
Active1943–1944
Country United States
Branch United States Army
TypeSpecial operations force
RoleAnti-tank warfare
Artillery observer
Bomb disposal
Casualty evacuation
Close-quarters battle
Counter-battery fire
Direct action
Guerrilla warfare
Hit-and-run tactics
Indirect fire
Jungle warfare
Long-range penetration
Military communications
Military intelligence
Mountain warfare
Raiding
Reconnaissance
Special operations
Special reconnaissance
Tracking
Trench warfare
SizeRegimental
NicknameMerrill's Marauders
EngagementsWorld War II
*Burma campaign
Commanders
Notable
commanders
Frank Merrill
Charles N. Hunter

Merrill’s Marauders (named after Frank Merrill) or Unit Galahad, officially named the 5307th Composite Unit (Provisional), was a United States Army special operations force unit that specialized in artillery observer, close-quarters battle, combat patrol, commando style raids in jungle warfare, guerrilla warfare, long-range penetration, special reconnaissance, and tracking targets to frontline military intelligence gathering or surprise attacks, which fought in the South-East Asian theatre of World War II, or China Burma India theater (CBI).

The unit became famous for its long-range penetration missions behind Japanese lines, often engaging Imperial Japanese forces superior in number.