BRINGING BACK LETTERS OF MARQUE: A reader is interested in the idea:

Thing is, I’ve enough money to hand to train, equip, and deploy six people for six months in the area between Baghdad and Kabul. I’m ex-military, and I’m young enough to be up for a challenge.

Why not open-source the Global War on Terror?

As I recall, the Independent Institute — a libertarian thinktank not to be confused with that other libertarian thinktank, the Independence Institute — was pushing this idea right after 9/11. And so was Ron Paul. If I recall correctly (and Wikipedia says the same thing) the United States never signed the treaty renouncing letters of marque and reprisal. So if you want one, apply to Congress, but I doubt the application will be received favorably at this point.