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Map tool created by the Chicago Tribune, updated June 2014. As of July 2020, it still works, but you need to manually zoom into the Vietnam area on the global map. The map location search function is not currently functional.
Find defoliant spraying missions by U.S. and South Vietnamese forces over Vietnam, Laos and Cambodia. The missions cataloged in this database begin in summer 1961 and end in spring 1971.