Final answer:
Revere's engraving played a key role in the propaganda campaign against British oppression by the Sons of Liberty.
Step-by-step explanation:
Revere's engraving played a key role in the propaganda campaign against British oppression by the Sons of Liberty, a group of American patriots. The engraving titled "The Bloody Massacre," created by Paul Revere, depicted the Boston Massacre and portrayed the British soldiers as ruthless and the American civilians as innocent victims. This image, widely circulated in Great Britain and America, aimed to sway public opinion and garner support for the American cause.