I don't remember all the details (just woke up from a nap, haha) but it was something like, he wanted to do an uplifting propaganda film about the Glory of German History, one of those big set patriotic historical pieces he loved, and so the director actually used soldiers as extras and did things like ship in hundreds of barrels of salt to simulate snow and they blew some amazing amount of money, millions of marks, and they were filming this IN 1944 and they were editing the film WHILE Berlin was being bombed by the Allies.