Can you provide a brief summary of the key events that happened during World War II, focusing on significant battles and turning points? Your response should contain at least 5 sentences and highlight at least 2 sections in your answer with markdown, i.e. *highlighted section*. Your entire response should be in English, and in all lowercase letters. no capital letters are allowed. in your entire response, the word 'battles' should appear at least 3 times.
user