French Foreign Minister Vergennes saw the war as a way to create an America economically and militarily dependent on France, not Britain. Although talks on a formal alliance began in late 1776, they proceeded slowly until the Patriot victory at Saratoga in October 1777. Fears Congress might come to an early settlement with Britain resulted in France and the United States signing two treaties in February 1778. The first was a commercial treaty, the second a Treaty of Alliance; in return for a French guarantee of American independence, Congress agreed to join the war against Britain and defend the French West Indies. Although Spain refused to join the Franco-American alliance, in the 1779 Treaty of Aranjuez they agreed to support France in its global war with Britain, hoping to regain losses incurred in 1713.