It's also most expensive movie made here in Latvia with budget of 4 000 000 Lats (around 8 000 000 $).
Here's a little info about the movie.
Here's some info about the Cineville (small town that was specially built for the above mentioned movie) with some very interesting pics for WW1 enthusiasts:

By the way, the location is opened for visitors - so if you ever visit Latvia, make sure to visit Cineville.