Query: When did the American War of Independence turn into a global conflict?
Context: But after her surprising grand success against a coalition of great powers, European states such as Austria, The Dutch Republic, Sweden, Denmark-Norway, Ottoman Empire, and Russia now saw Britain as a greater threat than France and did not join them, while the Prussians were angered by what they considered a British betrayal in 1762. Consequently, when the American War of Independence turned into a global war between 1778–83, Britain found itself opposed by a strong coalition of European powers, and lacking any substantial ally.