Image Source- https://dlozeve.github.io/ww2-bombings/
This map shows the bombing in World War II. The data for the map comes from Theater History of Operations (THOR) Data: World War II. The map was created by one of the users of GitHub. GitHub is a web-based Git and Internet hosting service. The data represents U.S., Australian, New Zealand, South African and Royal Air Force missions from 1939-1945. The map contains a total tons property for each bomb during World War II dropped on each location in terms of circles. Bigger the diameter of circle more is the ton of property of bomb dropped on that particular location.