Please help me with this question

Why do countries create guidelines and laws on how a country is going to be run?

Why was america’s victory at yorktown among the most significant battles of the american revolution? a. it made the british realize they were fighting a lost cause and soon after, they conceded the war. b. it forced colonists who had so far remained neutral to pick a side and enlist in the war. c. it the continental army remove all british barracks from new jersey. d. it secure france’s military and financial aid for the american cause. e.

Who led the continental army in the final decisive battle of the revolutionary war at yorktown