When you look well into the past of cinema, what you usually get are historically significant films, and that isn't absolutely a synonym for good films. Well here's one you may want to watch simply for the fact that it is good.
Sealed orders is Christiansen's first film (a man I only know for the film "Haxan")and it is war drama at it's best. Tragic twist of fate, clear storyline, good pacing and great lighting work. It's a few years in advance on it's time, but it isn't technical wonders of the cinema of the 20s or of now. It's still theatrical, though it isn't anything like the early films of it's time and before. The film survived to our days in a great condition, nothing like the jerky pictures moving at a wrong speed we like to think of.
To put it simply, you'll watch it and have a great time, as long you like dramas of this kind. But if you actually cared enough to read a IMDb review of a 1914 film, It's surely your kind.