This article first appeared in the Stars and Stripes Pacific edition, Oct. 31, 1959. It is republished unedited in its original form.

SEOUL, (S&S) — Operation Killing Zone, largest military field exercise since the founding of the First Republic of Korea Army, recently deployed 50,000 troops in a maneuver conducted under simulated atomic conditions.

The exercise held 50 miles north of Seoul, was a test of combat effectiveness during a chemical, biological and radiological war. The operation included mobile, attach and defense operations.

Elements of the ROK Air Force and the U.S. Army’s 4th Missile Command acted as supporting units.

Operation Killing Zone was observed by President Syngman Rhee. Also viewing the activities were Defense Minister Chung Yui Kim; Army Lt. Gen. John Coulter (ret.), now serving as U.S. Economic Adviser to Korea and other ranking civilians and military officials.