fearlessly

Suppose, for instance, the prisoner, as is more than probable, to have served under Napoleon—well, can you expect for an instant, that one accustomed, at the word of his commander, to rush fearlessly on the very bayonets of his foe, will scruple more to drive a stiletto into the heart of one he knows to be his personal enemy, than to slaughter his fellow-creatures, merely because bidden to do so by one he is bound to obey?