In one scene Lazar is talking about the smell of acacia honey (acacia was brought to Europe from America a few centuries after the battle on Kosovo).
In the opening credits, the name of the Ottoman Prince Bajazit Jildirim (Bayezid Yildirim) is incorrectly written as Bajazit Jildimir.
In the very beginning of the movie, while introducing Milos Obilic on his horse, there's a tractor behind him, on the left part of the screen.
In one of the battle scenes, a Turkish soldier has a digital watch on his wrist, which was very popular in late 1980s when the movie was filmed. The real battle occurred in 1389.
Vuk Brankovic in his speech is using the metric system of measurement, five centuries before it was historically adopted.