achievement

Moreover, I became strong exceedingly; I shrank from no achievement nor was I afraid of ought. For my heart was hard, and my liver was immovable, and my bowels without compassion.

The king spent some time in praising this man and then asked the last of all, What is the greatest achievement in ruling an empire?

And he said to Demetrius, 'How is it that none of the historians or 'the poets have ever thought it worth their while to allude to such a wonderful achievement?'