6 adjectives to describe vanguard

The secret vanguard, by Michael Innes, pseud.

(In A Southern vanguard)

Perhaps an adventurous rebel vanguard might attack them.

It was a radiant day In February, the month of the great struggle 'Twixt sun and frost, when with advancing spears, The glittering golden vanguard of the spring Holds the broad winter's yet unbroken rear In long-closed wavering contest.

These two hardy and daring adventurers formed the little vanguard of the bands of hunters and trappers, the famous Rocky Mountain men, who were to roam hither and hither across great West in lawless freedom for the next three quarters of a century.

Perhaps an adventurous rebel vanguard might attack them.

6 adjectives to describe  vanguard