Seventy years ago this week, Israeli forces crossed into Sinai. Within days, British and French troops had landed at Port Said. By November 6 the operation was over. Egyptian resistance did not stop it, nor did Soviet threats. A run on sterling did, together with Washington’s refusal to intervene on London’s behalf.
The Suez Crisis confirmed, in a particularly humiliating fashion for Britain, the transfer of Western hegemony from London to Washington. That transfer had quietly begun nearly a decade earlier, in February 1947, when Britain informed the United States that it could no longer sustain Greece and Turkey. The Truman Doctrine followed.
Britain emerged from the Second World War severely weakened. The conflict had undermined its ability to sustain a global empire, while nationalist and anti-colonial movements stripped away India, Burma, Ceylon, and the Palestine mandate. The Suez Canal, however, remained central to British imperial strategy. It connected the Mediterranean to the Indian Ocean and carried a large share of international trade and Middle Eastern oil. British maritime supremacy rested not only on naval strength but also on control of the strategic infrastructure through which global commerce flowed. Suez was both a symbol and an instrument of British power.
In July 1956, Egyptian President Gamal Abdel Nasser nationalized the Suez Canal Company. London regarded the decision as a direct threat to what remained of Britain’s imperial position. Prime Minister Anthony Eden entered into a secret arrangement with France and Israel to reverse the Egyptian fait accompli. On October 29, Israel invaded Sinai. British and French forces followed. The operation succeeded tactically and failed strategically.
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Moscow threatened rocket strikes on London and Paris, but the threat was a bluff. The decisive opposition came from Britain’s closest ally. President Dwight Eisenhower feared that a European colonial operation would strengthen Soviet influence in the Arab world and damage Washington’s standing with newly independent states. The United States also had little interest in allowing Britain and France to restore their imperial influence in a region increasingly central to American strategic interests.
Washington therefore weaponized its financial power. Sterling came under severe pressure, and Britain needed American support to defend its currency. Eisenhower withheld it. Harold Macmillan, the chancellor and the cabinet’s leading hawk, now counseled retreat. Eden had no choice. An operation meant to demonstrate Britain’s great-power status exposed its dependence on the United States.
The consequences for the maritime order were decisive. For more than a century, Britain had been its principal guarantor. Its navy, overseas bases, commercial networks, and financial institutions sustained a system built on control of strategic sea routes. Suez demonstrated that Britain could no longer exercise that control independently of Washington. The United States now held the position Britain had once commanded.
The most revealing aspect of the crisis was the surprise it caused in London. British leaders believed that the wartime alliance, close cultural ties, and the special relationship would secure American support, or at least tolerance. They had become prisoners of their own narrative. They mistook the rhetoric of the special relationship for an unconditional commitment and assumed that shared history and common values would prevail over conflicting interests. Eisenhower demonstrated otherwise.
International politics does not operate according to such assumptions. Alliances are not arrangements sustained by sentiment. They evolve as the distribution of power, perceptions of threat, and strategic interests change. At Suez, American interests temporarily converged with those of the Soviet Union and diverged sharply from those of Washington’s closest European allies.
Alliances between unequal powers provide the weaker partner with protection, resources, and diplomatic support. They also create dependence. When interests diverge, the stronger state can exploit that dependence to constrain its ally’s freedom of action. Suez illustrated this mechanism with unusual clarity. Britain still possessed substantial military capabilities, but it lacked the financial independence to use them against American opposition. Washington did not need to threaten British forces. It simply withheld the support on which London depended. Financial dependence had become an instrument of strategic control.
London and Paris drew opposite conclusions from the same humiliation. Britain resolved never again to stand on the wrong side of Washington. Macmillan, who succeeded Eden in January 1957, spent his premiership repairing the relationship, culminating in the Polaris agreement at Nassau in 1962. France concluded that dependence itself was the problem. It accelerated its nuclear program and, in 1966, left NATO’s integrated military command. Realignment with the patron or the pursuit of autonomy: these remain the two options open to a weaker ally once its patron has revealed the limits of its loyalty.
Egypt emerged strategically strengthened despite its military defeat, and Nasser became the symbol of Arab nationalism. Britain lost much of its remaining imperial prestige. Washington moved into the vacuum, and the Eisenhower Doctrine announced in January 1957 formalized its role as the dominant Western power in the Middle East.
Suez did not cause Britain’s decline. That process had been underway for decades. The crisis exposed, dramatically and publicly, a shift in the balance of power that British leaders had been reluctant to acknowledge.
The expression “Suez moment” has since entered the vocabulary of international politics. It describes a crisis that reveals what Walter Lippmann called foreign-policy insolvency: a gap between a great power’s commitments and the resources available to sustain them. Such a crisis forces governments and their allies to acknowledge a change in the distribution of power that has been developing for years. Its effects often appear first in the expectations and behavior of allies, before any visible decline in the dominant power’s position.
Some analysts argue that the United States could eventually face a comparable reckoning as China’s rise strains American commitments in the Indo-Pacific. This year’s war with Iran suggests the problem may already be emerging elsewhere, though the mechanism runs in reverse. In 1956 a dependent ally discovered that its patron could restrain it. In 2026 dependent allies are discovering that their patron cannot fully protect them. Despite America’s formidable military presence, the Gulf states learned that Washington could not shield them from Iranian retaliation in a war they had not chosen.
The Mecca Pact, signed in August by Saudi Arabia, Turkey, and Pakistan, reflects the resulting reassessment. The signatories have different principal adversaries, and the pact will not replace American guarantees. Its significance lies in the search for additional sources of protection. Like Suez, the current crisis turns on chokepoints, this time Hormuz and Bab al-Mandeb. Regional powers are diversifying their security relationships because they no longer regard exclusive dependence on Washington as sufficient. It is the French choice of 1956, made by Riyadh in 2026.
The analogy has limits. Britain in 1956 was financially dependent on a stronger ally, whereas the United States today retains formidable economic, military, and technological advantages. A loss of confidence among allies does not necessarily signal the end of American primacy. What matters is whether the underlying distribution of power has changed, how allies interpret that change, and whether the dominant state can bring its commitments into line with its capabilities.
Seventy years later, the lessons of Suez remain relevant. Alliances are indispensable instruments of national strategy, but their reliability depends on converging interests and the distribution of power. Shared values, historical ties, and ideological affinity can reinforce cooperation. They cannot eliminate conflicts of interest. States cooperate when cooperation serves their interests. When interests diverge, power decides whose preferences prevail.
