Noncombat region, in brief

DMZ

["This buffer zone often separates rival nations, like the famous one dividing North and South Korea since the 1950s."]

"Noncombat region, in brief" points to a place where military conflict is prohibited, often set up as a neutral buffer between opposing forces. The abbreviation "DMZ" stands for Demilitarized Zone, a term widely used in geopolitics and history—like the famous Korean DMZ. The clue’s "in brief" signals that the answer is an acronym rather than the full phrase.