Suez separated military success from political defeat

What important lesson from the Suez Crisis is often overlooked?

Britain and France were succeeding militarily, but political pressure - especially from the United States - ended the operation before that success could produce the intended result.

The political failure at Suez does not by itself show that the operation was militarily ineffective. British and French forces had largely achieved their immediate military aims before American intervention stopped them. Soviet threats formed part of the crisis, but direct action against two NATO nuclear powers carried serious escalation risks. The lesson is that operational capability and political freedom to use it are separate questions.