Operation Green Sweep
BLM, State of California (1990)
Joint federal, state and local event led by Drug Enforcement Agency (DEA) and the Bureau of Land Management (BLM)
Operation Green Sweep was a BLM eradication effort conducted in July and August 1990 in part of Northern California's Emerald Triangle, the King Range Nature Conservation District, where citizens of Humboldt County grow marijuana on federal land. Greensweep's objective at the outset, however, was not particularly clear. Initial objectives were to arrest and prosecute marijuana growers and traffickers, eradicate plants and restore the cultivation site to original conditions. The objective then focused on removal of agribusiness paraphernalia from the forest and restoration of the growing site. The scope of sanitizing forest growing sites was not understood by the military; it became a major enterprise. 
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- William W. Mendel, "Counterdrug Strategy - Illusive Victory: From Blast Furnace to Green Sweep", US Army’s Combined Arms Center, December 1992.