unconventional warfare

American  

noun

1. warfare that is conducted within enemy lines through guerrilla tactics or subversion, usually supported at least in part by external forces.

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Example Sentences

“We have been the experts on counterinsurgency, on conventional and unconventional warfare, for the past 25 years. That is not the case in the Arctic,” said Ryan P. Burke, professor at the U.S.

From The Wall Street Journal

Special forces are a branch of the military trained to carry out covert operations, often through unconventional warfare such as sabotage and diversion.

From Barron's

The Quds force that Soleimani led is a branch of Iran's Islamic Revolutionary Guard Corps which specialises in unconventional warfare and military intelligence.

From BBC

The “Gerasimov Doctrine of Hybrid Warfare” blends conventional and unconventional warfare, essentially expanding military battlefield options infinitely — including into cyberspace.

From Washington Times

Foreign internal defense and unconventional warfare are core missions of the U.S.

From Washington Times