Which document encouraged the colonists to fight until they reached independence?

The document that encouraged the colonists to fight until they achieved independence was Thomas Paine's pamphlet "Common Sense," published in 1776. In it, Paine passionately argued for the colonies' break from British rule, emphasizing the moral and practical reasons for independence. His compelling rhetoric and clarity of thought galvanized public opinion and motivated many colonists to support the revolutionary cause.