挺進ていしん Noun Irregular Intransitive English jmdict 1 noun (common) (futsuumeishi) noun or participle which takes the aux. verb suru intransitive verb formal or literary term going ahead of the others;advancing ahead of the main force
挺進隊ていしんたい Noun English jmdict 1 noun (common) (futsuumeishi) advance unit sent ahead of the main force on a special mission