'Humorous' , German cartoons, the frontline , World War I . “幽默” ， 德國漫畫， 前線 ， 第一次世界大戰。

'Humorous' German cartoons of life on the frontline in World War I are unearthed (and no, they're not funny) | Mail Online http://www.dailymail.co.uk/news/article-2113408/Humorous-German-cartoons-life-frontline-World-War-I-unearthed-theyre-funny.html