World War 1 involved powers beyond just Europe. Japan joined the Allied side by attacking German territories. China participated due to American involvement and attacks on Chinese ships. Thailand aided Britain while Germany plotted with Indian nationalists. The weakening Ottoman Empire also joined the Central Powers. The war reshaped the global order, leading to the rise of the US and Japan as world powers, the collapse of European empires, and the emergence of nationalist independence movements in Asia and the Middle East in the postwar period.