Within days of the news of Burgoyne's surrender reaching France, King Louis XVI decided to enter into negotiations with the Americans that resulted in a formal Franco-American alliance and the French entry into the war, moving the conflict onto a global stage.[4] Spain did not enter into the war until 1779, when it entered the war as an ally of France pursuant to the secret Treaty of Aranjuez.[5] Vergennes' diplomatic moves following the French war with Britain also had material impact on the later entry of the Dutch Republic into the war, and declarations of neutrality on the part of other important geopolitical players like Russia.[6] Opposition to the costly war was increasing, and in June 1780 contributed to disturbances in London known as the Gordon riots.[7]