ex·pe·di·tion·ary /-ˈdɪʃəˌnɛri/
(a.)遠征的,討伐的,探險的
Ex·pe·di·tion·a·ry a. Of or pertaining to an expedition; as, an expeditionary force.
◄ ►
expeditionary
adj : (used of military forces) designed for military operations
abroad; "the French expeditionary force in Indochina"