If I am asked what we are fighting for, I can reply in two sentences. In the first place, to fulfil a solemn international obligation . . . an obligation of honor which no self-respecting man could possibly have repudiated. I say, secondly, we are fighting to vindicate the principle that small nationalities are not to be crushed in defiance of international good faith at the arbitrary will of a strong and overmastering Power.
Statement to House of Commons: Declaration of War with Germany, August 4, 1914.