My group had a hard time keeping straight the white and black pieces for attack and defense. The new attack and defense markers in the kickstarter will make this more clear:
"The attack and defense markers are thick wooden markers made to look like the red crossed swords and blue defense shield shown on the troop tiles. The Wars Fought marker is a cannon. We're attempting to get a photo showing the pieces, but they are still in the tooling phase. We'll post the photo the moment we have one though."