you've definitely got something going with the tank, but the waaa could go. you've got such a strong image with the tank, the waaa doesn't need to be so large. maybe on the back of the shirt much smaller near the collar and centered. great job on the tank...
i'm not sure if you've ever seen or heard of this company and i don't know if they're even in business anymore but they called themselves "war skateboards" and "war" was pretty much their logo. The way you have the text kinda reminds me of it and also combined with the image of the tank, i was just wondering if you had ever heard of them?