noun, noun or participle which takes 'suru', intransitive verb
pushing ahead; advancing ahead of others
Formal or literary term for moving forward ahead of a group, especially in a military or competitive context. Often used as a noun or with する to mean 'to advance ahead of the main force'.
彼の部隊は敵陣に挺進した。
His unit advanced ahead into the enemy lines.
His attitude of pushing ahead at the forefront was praised.