War isn't what it used to be -- at least according to the conventional wisdom that modern warfare is now irregular and asymmetric, making traditional forces largely obsolete. But military historian Max Boot argues that guerrilla warfare and insurgency are hardly recent developments. Those tactics were actually common for most human history. In his new book, "Invisible Armies," Boot traces the history of irregular warfare.
From the Archives: Max Boot's "Invisible Armies"
Max Boot, senior fellow for national security studies at the Council on Foreign Relations, and author of "Invisible Armies: An Epic History of Guerrilla Warfare from Ancient Times to the Present"