Pay particular attention to "Declaration Day", "When The Eagle Cries", "Greenface" (written about Special Ops guys), "The Reckoning" (about revenge for 9/11), "Valley Forge" and the spectacular Gettysburg Trilogy (last three somgs).
Thanks -- some inspiring stuff there. These guys seem to have a genuine appreciation for our history. You wouldn't expect that out of heavy metallers, but it's great to see.