>>17930710 (OP) >using the modern German flag to represent Prussia, Austro-Hungary, and the collective of random tribes that the Catholic Church segregated from the civilized world
>>17930717
Technically the black/yellow/red flag first appeared in the 18th century although you're right it wasn't prominent until later.
The reason I didn't use the HRE flag is because that could also be used to represent Czechs and Italians