attack on the Chūgoku region (1577, by Oda Nobunaga)
Historical term referring to Oda Nobunaga's 1577 campaign against the Mōri clan in the Chūgoku region. Used in discussions of the Sengoku period.
The Chūgoku campaign was an expedition undertaken by Oda Nobunaga to subdue the Mōri clan.
Compound of 中国 (Chūgoku, the region) and 攻め (attack, from 攻める). The term is specific to the historical event.