Mezue nkebi ahịrịokwu na-esonụ: Ọ bụ mgbe ndị Nazi Germany wakporo Poland na September 1, 1939, Briten na Frans amalitekwa ịlụso Germany agha mgbe ụbọchị abụọ gasịrị ka Agha Ụwa nke Abụọ malitere. Mgbe e kwusịrị agha ahụ, na mbụ, ọ bụ nanị obere agha ka a lụrụ n'ala ma ọ bụ n'ikuku n'ebe ọdịda anyanwụ Europe, a kpọkwara oge ahụ "Agha Ụgha". Otú ọ dị, n'ebe ọwụwa anyanwụ Europe, nkwekọrịta dị n'etiti Soviet Union na Nazi Germany nke e bịanyere aka na ya n'August 23 meghere ụzọ na September maka mwakpo Soviet Union nke ọwụwa anyanwụ Poland, nke e kewara n'etiti ndị mwakpo abụọ ahụ tupu njedebe nke ọnwa ahụ. Soviet Union malitere mwakpo agha ọhụrụ site
na-awakpo Finland na ngwụsị November.