detachment
de.tach.ment \di-'tach-m*nt\ n 1: the action or process of detaching : SEPARATION 2a: the dispatch of a body of troops or part of a fleet from the main body for a special mission or service 2b: the portion so dispatched 2c: a permanently organized separate unit usu. smaller than a platoon and d ifferent in composition from normal units 3a: indifference to worldly concerns : ALOOFNESS, UNWORLDLINESS)M 3b: freedom from bias or prejudice