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- Operation_Ranch_Hand abstract "Operation Ranch Hand was a U.S. military operation during the Vietnam War, lasting from 1962 until 1971. Largely inspired by the British use of 2,4,5-T and 2,4-D (Agent Orange) during the Malayan Emergency in the 1950s, it was part of the overall herbicidal warfare program during the war called "Operation Trail Dust". Ranch Hand involved spraying an estimated 20 million U.S. gallons (76,000 m3) of defoliants and herbicides over rural areas of South Vietnam in an attempt to deprive the Viet Cong of food and vegetation cover. Areas of Laos and Cambodia were also sprayed to a lesser extent. Nearly 20,000 sorties were flown between 1961 and 1971. The Vietnamese government estimates that 400,000 people were killed or maimed and 500,000 children born with birth defects as a result of this spraying of what were called by the Americans 'rainbow herbicides'.The "Ranch Handers" motto was "Only you can prevent a forest" – a take on the popular U.S. Forest Service poster slogan of Smokey Bear. During the ten years of spraying, over 5 million acres (20,000 km2) of forest and 500,000 acres (2,000 km2) of crops were heavily damaged or destroyed. Around 20% of the forests of South Vietnam were sprayed at least once.The herbicides were sprayed by the U.S. Air Force flying C-123s using the call sign "Hades". The planes were fitted with specially developed spray tanks with a capacity of 1,000 U.S. gallons (4 m3) of herbicides. A plane sprayed a swath of land that was 80 meters wide and 16 km (≈10 miles) long in about 4½ minutes, at a rate of about 3 U.S. gallons per acre (3 m3/km2). Sorties usually consisted of three to five airplanes flying side by side. 95% of the herbicides and defoliants used in the war were sprayed by the U.S. Air Force as part of Operation Ranch Hand. The remaining 5% were sprayed by the U.S. Chemical Corps, other military branches, and the Republic of Vietnam using hand sprayers, spray trucks, helicopters and boats, primarily around U.S. military installations.".
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