Valkyria Chronicles and history lessons

[Torillian]

I don't remember the Empire being blamed for the first Europan War, but they were definitely involved in some way.

The protagonists are as Non-gravity mentioned, a smaller neutral country that is stuck between two conglomerates of nations at war. Most of the game is spend fighting the Empire, but they don't have any love for the alliance either and their duplicitous tactics. Pretty sure duplicitous works their, but lets just reiterate by calling them sneaky