During the fight for independence, Benjamin was sent to Europe to represent the thirteen colonies. In 1776, he signed the Declaration of Independence, and in 1778 he signed the Treaty of Alliance with France. In addition, Benjamin negotiated with the French to help the colonists and became the first United States minister to France. Bejamin helped to secure guns, ammunition, and other provisions for the army as well as volunteer troops. When the colonists won their independence in 1781, he helped negotiate the peace with England and signed what ultimately became known as Treaty of Peace with Great Britain in 1782.
Upon returning to America Benjamin helped decide the type of government that would be established. He was chosen to help bring about the Constitution of the United States. Benjamin also contributed to drafting the Declaration of Independence.