foreign internal defense

Definition/Scope: (FM 3-0) Foreign internal defense is the participation by civilian and military agencies of a government in any of the action programs taken by another government to free and protect its society from subversion, lawlessness, and insurgency.

Acronym:

FID

Broader Terms:

Irregular Warfare

Related Terms:

combating terrorism
counterinsurgency
foreign internal defense augmentation force
nation assistance
Security Force Assistance
special operations
support to insurgency
unconventional warfare