I ran across this white triangle with a U in it https://i.imgur.com/q2Jul3Y.png in a movie recently and can't figure out what it means.
I've found the usual charts for prisoner markings but there seems to be nothing like it.
I am wondering if anyone can help me figure out if it's either a real thing or just made up movie bull.
Hello there! As your question is related to looking for identification/information regarding military personnel, our Guide on Military Identification may be of use to you. It provides a number of different resources, including how to request service records from a number of national agencies around the world, as well as graphical aids to assist in deciphering rank, unit, and other forms of badges or insignia. While the users here may still be able to lend you more assistance, hopefully this will provide a good place to start!
It's the latter. As you can see in the official prisoner badges table, there were no white triangles. Neither does a google search bring up anything.
The letter U, however, would mean Ungar(isch)/Ungarn (Hungarian/Hungary) in a real badge, since these letters specified the nationality (in the table two examples are given - P (Pole), T (Tscheche, Czech)). Though I should mention that at least one source I found says it refers to Ukrainians. Maybe it was both.
I think we all know that directors don't always care about historical accuracy.