二战中为了摧毁纳粹德国的工业基础，美国和英国的重型轰炸机，投下两百万吨炸弹，摧毁60个城市，为此牺牲八万名飞行员。

https://politics.utoronto.ca/publication/fire-and-fury-the-allied-bombing-of-germany-1942-1945/#:~:text=During%20the%20Second%20World%20War,and%20leaving%2080%2C000%20pilots%20dead.