Who defeated Austria-Hungary in World War 1?

Austria-Hungary was defeated in World War I primarily by the Allied Powers, which included countries such as France, the United Kingdom, Italy, and the United States. The military pressure from multiple fronts, combined with internal strife and economic difficulties within the Austro-Hungarian Empire, led to its collapse. The war concluded for Austria-Hungary with the signing of the Armistice on November 3, 1918, and the subsequent treaties that dissolved the empire.