put someone to the sword
put (someone) to the sword
To slay or execute someone, especially in or as a consequence of war. These prisoners will be shown no mercy—we shall put them to the sword before sunrise.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
put someone to the swordkill someone, especially in war.
Farlex Partner Idioms Dictionary © Farlex 2017