Free-fire Zone

A free-fire zone in U.S. military parlance is a fire control measure, used for coordination between adjacent combat units. The definition used in the Vietnam war by US troops may be found in field manual FM 6-20:

A specific designated area into which any weapon system may fire without additional coordination with the establishing headquarters.

Read more about Free-fire Zone:  Free-fire Zones in The Vietnam War, Wilkerson, WWII, Yeager, Soviets in Afghanistan, Other Uses of The Term

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    There was a continuous movement now, from Zone Five to Zone Four. And from Zone Four to Zone Three, and from us, up the pass. There was a lightness, a freshness, and an enquiry and a remaking and an inspiration where there had been only stagnation. And closed frontiers. For this is how we all see it now.
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