Um...I think it's about war. It is "trench war in the pavement," and also I think it's "matching faces with feet." These two lines seem directed at war, the former directly, that latter referring to amputations or soldiers losing limbs in battle. "Trip some wires" I always thought referred to tripping an explosive wire. I also think it's "whores and cannonballs." Which is more war references.
Um...I think it's about war. It is "trench war in the pavement," and also I think it's "matching faces with feet." These two lines seem directed at war, the former directly, that latter referring to amputations or soldiers losing limbs in battle. "Trip some wires" I always thought referred to tripping an explosive wire. I also think it's "whores and cannonballs." Which is more war references.