noun
unconventional warfare
Military term for warfare that differs from conventional large-scale operations, including guerrilla tactics, insurgency, and asymmetric conflict.
不正規戦は、正規軍同士の戦いとは異なる戦術を用いる。
Unconventional warfare uses tactics different from those of battles between regular armies.
Conventional warfare between regular armed forces, contrasting with the irregular tactics of 不正規戦.
Compound of 不 (non-), 正規 (regular), and 戦 (warfare). The term is a modern calque from English 'unconventional warfare'.