無む防ぼう備び都と市し宣せん言げん

noun

open city declaration

A formal declaration that a city is undefended and will not be militarily contested, used in international law and historical contexts such as World War II.

• 第だい二に次じ世せ界かい大たい戦せん中ちゅう、パリは無む防ぼう備び都と市し宣せん言げんを行おこない、戦せん闘とうを避さけた。

  During World War II, Paris made an open city declaration and avoided combat.