[dragonwriter]

> NATO is just a mainly defensive alliance. So far, it has fought exactly zero defensive wars

1 in direct mutual self-defense, actually.

> but a number of offensive ones

NATO has conducted, I believe, two operations that were neither mutual self-defense under Article 5 nor at the invitation of the government in whose territory they were conducted nor under a direct call for military forces by the UN Security Council under its notionally-compulsory authority regarding matters of international peace and security, the operation in Libya (which was to enforce Security Council resolutions, but not itself in response for a call by the Council for armed force) and that in response to the Kosovo situation.