WWII: number of people mobilized by selected countries 1937-1945
2.3 billion, meaning that between five and six percent of the world was drafted into the military in some capacity. Approximately one in every 25 people mobilized were women, who generally served in an administrative or medical role, although hundreds of thousands of women did see active combat.
Over the course of the Second World War approximately 127.2 million people were mobilized. The world's population in 1940 was roughly