What significant event occurred during the French Revolution when members of the Third Estate vowed not to disband until a new constitution was established?

The significant event that occurred during the French Revolution, when members of the Third Estate vowed not to disband until a new constitution was established, is known as the Tennis Court Oath. This pivotal moment took place on June 20, 1789, when the Third Estate, feeling marginalized and disrespected by the other estates, gathered in a tennis court after being locked out of a meeting of the Estates-General. They committed to creating a constitution for France, emphasizing the principles of popular sovereignty and the need for a government that represented the will of the people.

This event is crucial as it symbolizes the shift in power dynamics from the absolute monarchy to a more representative government, laying the groundwork for the subsequent developments in the French Revolution. It marks a significant act of defiance against the monarchy and represents the Third Estate's determination to assert their rights in the face of oppression. Other notable events of the revolution, such as the Storming of the Bastille and the Declaration of Rights of Man, occurred around the same period but do not specifically reflect the commitment to constitutional reform made by the Third Estate in the Tennis Court Oath.