Adolf ni Tsugu, Kuroi Ame ni Utarete Recommendations
Both are classic manga written by two pioneers of the medium. They create a similar mood and have similar art styles. Both manga have World War II as their focus, showing its atrocities and the impacts they had in the lives of innocents. While "Adolf ni Tsugu" shows mostly the crimes committed by the Nazis, "Kuroi Ame ni Utarete" shows the effect of the atomic bombing of Japan and how it affected the lives of people living in Hiroshima even after the war. Also, both manga contain strong political messages.