Great Britain hoped that the Intolerable Acts would isolate radicals in Massachusetts and cause American colonists to concede the authority of Parliament over their elected assemblies. It was a calculated risk that backfired, due to the harshness of some of the acts having made it difficult for moderates in the colonies to speak in favor of Parliament. The acts promoted sympathy for Massachusetts and encouraged colonists from the otherwise diverse colonies to form committees of correspondence which sent delegates to the First Continental Congress. The Continental Congress created the Continental Association, an agreement to boycott British goods. Additionally, it was decided that if the Coercive Acts were not reversed after a year, goods were to stop being exported to Great Britain as well. The Congress also pledged to support Massachusetts in case of attack, which meant that all of the colonies would become involved when the American Revolutionary War began at Lexington and Concord.