Second All-Out War on Israel’s Border Now Closer Than Ever

MARJAAYOUN, Lebanon—For a few hours it looked like war, a real war that could escalate into the all-out Middle Eastern conflict the world has been dreading.

Early Sunday morning, around a hundred Israeli warplanes launched missile strikes in what it called preemptive action to take out Hezbollah rocket launchers in southern Lebanon. Shortly afterward, the Iranian-backed militia group launched hundreds of drones and missiles...