A new issue of Air and Space Power Journal is out. Luis Paulo Bogliolo (LSE): Rethinking Military Necessity in the Law of Armed Conflict. Iver Gabrielsen (King’s College): Why Did Violence Decline During the US “Surge” in Iraq? The guerrilla myth: Unconventional wars are our most pressing national security concern — they're also the most ancient form of war in the world; Max Boot on the lessons of insurgency we seem unable to learn (and more from Foreign Affairs). Justin Green reviews Max Boot's Invisible Armies: An Epic History of Guerrilla Warfare from Ancient Times to the Present. Is war civilized? Daniel A. Vell reviews The Verdict of Battle: The Law of Victory and the Making of Modern War by James Q. Whitman. Dylan Matthews on everything you need to know about the drone debate, in one FAQ. Tal Tovy reviews Arc of Empire: America's Wars in Asia from the Philippines to Vietnam by Michael H. Hunt and Steve Levine.