noun
A buffer area where military forces are prohibited, often established by ceasefire agreements. Commonly abbreviated as DMZ.
休戦地帯には国連の監視団が駐留している。
A UN monitoring team is stationed in the demilitarized zone.
両国は休戦地帯の幅を10キロに設定した。
Both countries set the width of the demilitarized zone at 10 kilometers.
非武装地帯 is a more general term for any demilitarized area, while 休戦地帯 specifically implies a zone established by a truce or armistice.
Compound of 休戦 (kyūsen, 'ceasefire') and 地帯 (chitai, 'zone'). The term is a direct translation of the English 'demilitarized zone'.