The Axe Murder Incident.

In an incident known as the "Axe Murder Incident" or the "Hatchet Incident", a United Nations Command workforce trimming a tree at the North-South Korean border in August 1976 was attacked and killed by North Korean soldiers.

Lieutenant Pak Chul of the KPA, seeing that he was losing control, took off his wristwatch, wrapped it in his handkerchief and put it in his pocket. Another North Korean rolled up his sleeves. Lieutenant Pak then shouted "MI KUN UL CHU KI GI CHA." Translated, it means, "Kill the U.S. Aggressors."; the UNC security force was attacked by a superior force of 30 KPA guards wielding pick handles, knives, clubs, and axes.

The US Response: Operation Paul Bunyan, where overwhelming force was sent in to cut down the tree.

Read more: http://members.terracom.net/%7Evfwpost/opn-PB.html (via Metafilter)