Vinland Saga

A man with a red feather in his hair stands on a wooden platform, then the scene cuts to a close-up of a man in a helmet screaming as he holds a sword, followed by a close-up of a smiling man's face, then a blonde man gripping a knife, then a fight scene where a man in a red tunic swings a sword at a blonde man who dodges, and finally a split screen showing a woman in a white headscarf and a man in a helmet with a crowd in the background.