Final answer:
The Tennis Court Oath was taken to establish the National Assembly during the French Revolution, representing the interests of the people and limiting the power of the monarchy.
Step-by-step explanation:
The primary purpose of the Tennis Court Oath was to establish the National Assembly. The Tennis Court Oath was a pivotal event during the French Revolution when members of the Third Estate, who represented the common people, gathered at a tennis court in Versailles and pledged not to disband until a new constitution was established. This oath marked the beginning of the National Assembly, which sought to represent the interests of the people and limit the power of the monarchy.
Learn more about Tennis Court Oath