The theory of popular sovereignty is a political idea that holds that <u>the power and authority of a state and its government emanate from the people, who is the ultimate source of all political power</u>.
The theory of popular sovereignty can be traced back to the idea of the social contract as advanced by influential thinkers such as Thomas Hobbes and Jean-Jacques Rousseau. They argued that the state existed as a result of a social contract established between the people and the state, where the people would give authority to the state to rule in exchange for order and protection. This meant that while the state and its government administrate society, ultimately its power comes from the people, who is the true sovereign.
Explanation: Because with this battle the continental army was able to overcome that fear they had towards the Hessian forces and were filled with sufficient security, a feeling that was elementary to understand that they could face other European armies of that magnitude.