"Cannon to the right of them,
Cannon to the left of them,
Cannon in front of them."
Years ago, when I was introduced to "The Charge of the Light Brigade" (Tennyson, 1854) our teacher pointed out the repeated use of the word "cannon", like a refrain, was a figure of speech. He went on to give other examples, of which my mind retained only this:
Victory at all costs,
victory in spite of all terror,
victory however long and hard the road may be. (Winston Churchill, June 1940)