outer curtain (military encampment)
Historical term for the outer curtain or screen used in a traditional military encampment. Contrasts with 内幕 (うちまく), the inner curtain.
See also: 内幕
In Sengoku-period encampments, the commander's quarters were enclosed by an outer curtain and an inner curtain.
Compound of 外 (と, 'outside') and 幕 (まく, 'curtain'). The reading と for 外 is an older native Japanese reading.