At what point during (or after?) WW2 did people start referring to it as "World War II"?

by LadyLins

And do we know who or which media outlet first mentioned the war in that way?

panzerkampfwagen

https://www.reddit.com/r/AskHistorians/comments/2a343u/when_did_people_start_calling_it_world_war_2/cir1fxs

This should answer your question.