“…Grygiel (2006:220–221), for example, concludes an otherwise provocative article on “imperial allies” with the following lesson from the Roman experience: “A powerful, and timeless, reminder of the consequences of a defeat—and withdrawal, albeit temporary, from international commitments—is the immediate aftermath of the battle of Cannae (216 BCE), where the Roman army was thoroughly beaten by Hannibal’s Carthaginian invading force.” The defeat led “several Italian allies of Rome” to defect “to Hannibal’s side.” The “United States,” he notes, “may want to heed this lesson when it deals with its current allies” and thereby not expect “retreat” to “lead to an increase in friendly feelings abroad, as some hope.”…”