Sentence:  To Bribes, unbow'd: yet ductile in Command: / Their Heart, their "Country's"—and their "King's," their Hand, / STILL-but how chang'd! -"thus, thus," were Armies "taught;" / Un-paid, thus <WSD>tractile</WSD>; and thus rais'd, un-bought: 
Meaning of the word marked with <WSD> tags:  Capable of being led.