How does the authors of Paul Revere's Ride develop the central idea

The main idea of of Paul Revere's Ride is wanting to free America from England. In his earnest passion, he was not afraid to ride on a horse to warn Massachusetts of the arrival of British colonies. He shouts, "The British are coming!", risking his life just to free America.

These were the following figures of speech he used to convey the idea of his gallant bravery.

Simile: "across the moon like a prison bar"

Alliteration: "struck out by a steed flying fearless and fleet"

Personification: "the watchful night wind, as it went, creeping from tent to tent"

Assonance: "on then rising tide like a bridge of boats"

The overall poem format was in a narrative form.

Explanation: