A good piece in the Wall Street Journal about the myths of guerilla warfare. It is focused on modern war, but gives good insight into the nature of ancient battles, especially those like the Battle of Teutoburg Forest. Asynchronous warfare became a term in vogue around six, seven years ago, this is a more sober perspective:
Tribal war, pitting one guerrilla force against another, is as old as humankind. A new form of warfare, pitting guerrillas against "conventional" forces, is of only slightly more recent vintage—it arose in Mesopotamia 5,000 years ago. Calling guerrilla warfare "irregular" or "unconventional" has it backward: It is the norm of armed conflict.
Many of the world's current boundaries and forms of government were determined by battles between standing armies and insurgencies. Think of the United Kingdom, which was "united" by the success of the English in defeating centuries-old Scottish and Irish guerrilla movements. The retreat of the British Empire was partly the result of successful armed resistance, by groups ranging from the Irish Republican Army in the 1920s to the Zionists in the 1940s. Earlier still, the war waged by American colonists, some of them fighting as guerrillas, created the U.S., which reached its present borders, in turn, by waging centuries of unremitting warfare against Native American insurgents.
Full story here.