Escalation Trap

Escalation Trap

The Marine Threshold: 5,000 Marines and the 82nd Airborne—And Still No Ground War

How to spot, before headlines, the moment a ground war begins

Prof Robert Pape's avatar
Prof Robert Pape
Mar 27, 2026
∙ Paid

Right now, there is a specific, observable threshold that will determine whether the United States enters a ground war with Iran—and it is not troop numbers.

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