Veterans-Related SERPs Well-Covered

I was going to start running a ppc campaign to drive traffic to websites raising funds for U.S. veterans and families of soldiers in Iraq and Afghanistan, but realized that many, many people have already plastered AdWords with links to the organizations that I would've drove traffic to. Examples here, here, here and here.

Try as I might, I was unable to find a single related keyword for which 1-5 charitable organizations weren't already driving traffic from AdWords.

This is on area of paid search that is well-covered - as it should be.