Anime movie help Finding the name?!

Ok this is what i remember there were two guys that look exactly the same and each of them was like a leader of somthing and then i remember they both needed these swords and one was in a girl and she died and at the end they run at each other with the swords and one gets his head cut in half and the other was is hurt/still alive This might be a series!? or movie!?Www@Enter-QA@Com

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