The original ideas for the film was having it about the war in Afghanistan, before it was changed to Kosovo, then finally changed once more to Bosnia.
In the scene with the buried feet, those are actual feet and not mannequins. The feet is that of actor Siobhan Daly's who was buried in the ground.
In the scene where the actor Michael Dylan acts sick, he was actually physically sick for real and production had to be stopped momentarily.
Although fluid Serbian is spoken, none of the actors are fluent in Serbian and none had previously spoke the language in any context. As a result the actors and crew practiced Serbian at all times in preparation.