Complex sentence: On August 23,1914, Japan declared war on Germany and as a result of the treaty with Britain, Japan became a member of the Entente powers and found itself on the side of its former enemy, Russia.
Split into simpler sentences: On August 23,1914, Japan declared war on Germany and as a result of the treaty with Britain, Japan became a member of the Entente powers. Japan found itself on the side of its former enemy, Russia.