If you, like me, love the finnish language, this is the best song. But yeah, anything Ensiferum is pretty swell!
Hey I just posted that a couple days ago! Great minds think alike. (; Also I'm listening to this. Code: https://www.youtube.com/watch?v=3S4kcpyiSaE I just put the link because the only video I can find has a semi-NSFW image on it.
The story this song tells can't be done enough glory. The Battle of Stamford bridge marked the end of the age of the vikings. Despite the efforts of more than a few brave men, stray arrows and poor positioning ended Harald and his followers. It picks up at 1:25