How do i start a paragraph for a research paper about world war ii?

If it's just about WWII in general then something along he lines of. World War 2 was the inevitable outcome of the failure of the treaty of Paris after world war 1 especially through Germany. The Germans began by going against armistices and invaded nearby countries. Soviet Russia allied with Germany early in the War along with Japan. The United States joined the war early as well breaking its attempt at a return to normalcy after the Japanese bombed Pearl Harbor.