Corps
late 16th century: from French, from Latin corpus ‘body’.
wiktionary
From French corps d'armée(literally “army body”), from Latin corpus(“body”). Doublet of corpse and corpus. See also English riff.
Clipping.
etymonline
corps (n.)
"a part of an army expressly organized and having a head," 1704, from French corps d'armée (16c.), which apparently was picked up in English during Marlborough's campaigns, from French corps (old French cors) "body," from Latin corpus "body" (from PIE root *kwrep- "body, form, appearance"); see corpse, which is a doublet of this word, for the pronunciation.
The field corps, a tactical unit of a large army composed of two or more divisions, began with Napoleon. The word was extended to other organized groups under a leader, as in corps de ballet (1826), corps diplomatique (1796). Corpsman "enlisted medical auxiliary in the U.S. military" is from 1941.
