Our chains are forged their clanking may be heard on the plains of Boston what kind of figurative language is that?

The phrase "Our chains are forged; their clanking may be heard on the plains of Boston" employs metaphor and personification. The "chains" symbolize oppression or bondage, suggesting that the struggle for freedom is palpable and widespread. The clanking sound personifies the chains, making the concept of oppression feel immediate and tangible, emphasizing the urgency of the fight for liberty.