As Trump contemplates a ground operation in Iran, he will be reckoning with the ghosts of previous western “excursions” in the region, as he recently labeled this war. History suggests three endgames for his intervention in Iran are plausible. First, a hasty deal on terms that aggrandize and empower Iran, creating an American equivalent to Britain’s Suez Crisis. Second, a protracted struggle which becomes structurally reminiscent of the Iraq War. Third, a dramatic escalation which achieves Iranian surrender quickly and cleanly. The bad news for Trump is that the outcome he seeks, number three, is the one without real precedent....