sheathe the sword

fall on one's sword

To resign from a job or other position of responsibility, especially when pressured to do so.

flesh one's maiden sword

To experience or succeed in combat or struggle for the first time, as in the military or in politics.

put to the sword

To execute, especially by using a sword.

sword and sorcery

Of or pertaining to a genre of narratives—including short stories, novels, television shows, films, and computer games—which combines wizardry and other fantastical supernatural elements with violent combat using pre-modern weaponry.

the pen is mightier than the sword

More influence and power can be usurped by writing than by fighting.