Final answer:
The 13 Colonies achieved independence from Great Britain through a strong sense of unity and shared purpose, exemplified by the Declaration of Independence and intercolonial cooperation through communicative and legislative bodies.
Step-by-step explanation:
Unity and Success of the 13 Colonies
Despite their differences, the 13 Colonies achieved a monumental feat by uniting against a common enemy to gain independence from Great Britain. They were capable of fostering a sense of community and shared purpose among diverse economic and social backgrounds, as exemplified by the signing of the Declaration of Independence. The intercolonial cooperation developed through the Committees of Correspondence and the Continental Congresses played a crucial role. Even as they encountered measures like the Sugar and Stamp Acts and the Intolerable Acts which raised tensions, the spirit of cooperation and shared ideals of liberty and self-governance grew stronger. Their triumph in the battle for independence was attributable to this collective sense of identity and purpose, which allowed them to overcome Great Britain's military might.