MCR is pretty good.

However, I never openly admit this, because all the damned fan-girls drive me nuts. >_<
But yeah, I've been listening to Sabaton lately. These guys are a Swedish power-metal band, but what makes them awesome is the fact that ALL(save, like, two) of their songs are based of war history!
Some of my favourites are:
40:1 - About the Battle of Wizna, which occurred near the beginning of the invasion of Poland during WWI. In this case, 40:1 is referring to the ratio of German troops (42200, complete with over 100 howitzers and well over 300 tanks) to Polish defenders (720). The actual ratio is something like 58:1, but that hardly makes it less badass. Eat your heart out Thermopylae!
Ghost Division - An awesome song about the 7th Panzer Division.
White Death - This is a song about the Finnish sniper Simo Häyhä, the best of the best. This guy, while lying still in the freezing -30 degree snow during the dark northern winter, used an un-scoped rifle to take out 505 Soviet soldiers, earning him not only a badass nickname, but also a place in history as the most effective sniper ever. Also survived a bullet to the face, and lived to a ripe age of 96.