Etymology
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Iron Cross 
from German eiserne kreuz, instituted 1813 by Frederick Wilhelm III of Prussia, originally for distinguished military service in the wars against Napoleon.
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civil service (n.)

"the executive branch of the public service," as distinguished from the military, naval, legislative, or judicial, 1765, originally in reference to non-military staff of the East India Company, from civil in the sense "not military." Civil servant is from 1792.

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a la carte 
"ordered by separate items" (itemized on a bill); distinguished from a table d'hôte, indicating a meal served at a fixed, inclusive price; 1826, from French à la carte, literally "by the card" (see a la + card (n.1)).
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Agent Orange (n.)
powerful defoliant used by U.S. military in the Vietnam War, reported to have been used from 1961; so called from the color strip on the side of the container, which distinguished it from Agent Blue, Agent White, etc., other herbicides used by the U.S. military; see agent (n.). Banned from April 1970.
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