What is the importance of WWII in the memoir, Who I Am?

From 1939 to 1945 there was a war known as 'The Second World War' or 'World War II'. Many of the countries of the world took part, fighting on one of two sides. Britain and the countries of the British Empire were allied with France and others, and later the USA (this side was known as the Allies), against Germany and its allies, which had taken over most of Europe. Britain was bombed heavily during the war. Eventually the Allies won.