On June 17,1789 the Third Estate formed the National Assembly and invited the reprasentatives of the clergy and the nobility to join them. Three days later, finding themselves locked out of the hall where they usually met, they marched as a group to the royal tennis court, where each man swore an oath not to disband until France had a new constitution. This is known as the Tennis Court Oath, and is considered by many to be the beginning of the Franch Revolution.
