An Anglo-French victory at Suez would not settle Egypt cleanly

What might happen if the United States supported Britain and France during the Suez Crisis?

They might win the immediate confrontation, but Egypt could face prolonged conflict and possible regime change, with no simple predictable settlement.

The counterfactual removes the decisive American opposition to Britain and France during the Suez Crisis. The result would not automatically become a wider world war. Instead, victory could lead to continuing conflict inside Egypt and might produce regime change. The political chain becomes difficult to predict, so battlefield success should not be treated as a stable postwar outcome.