Nasser nationalized the Suez Canal in July 1956. Britain and France called it theft. Three months later, they invaded, alongside Israel, to take it back by force. The operation was a military success and a political collapse. The empire that had owned the canal for eighty years didn't lose it to Egyptian tanks. It lost it to a phone call from Washington.
The Setup
On July 26, 1956, Egyptian President Gamal Abdel Nasser nationalized the Suez Canal Company, days after the United States and Britain withdrew funding for the Aswan Dam. The canal was not a symbolic asset. Two-thirds of Western Europe's oil supply moved through it, and a quarter of Britain's total imports, along with two-thirds of its own oil, passed through the same channel. London and Paris treated the nationalization as an act of war.
What Happened
On October 29, 1956, Israel invaded the Sinai. Britain and France followed two days later, bombing Egyptian airfields and landing troops at Port Said. Militarily, the operation worked. Politically, it detonated on contact with Washington. Eisenhower had not been informed of the invasion in advance, and he was furious. Egypt sank ships in the canal to block it, cutting the route Europe depended on for its oil.
The Aftermath
The United States refused Britain's request for an IMF loan and withheld Export-Import Bank credit until a ceasefire was signed. It also threatened to sell its holdings of British sterling bonds, a move that could have collapsed the pound. Prime Minister Anthony Eden accepted a UN-brokered ceasefire on November 6. British and French troops withdrew by December. The UN deployed its first peacekeeping force, UNEF, to the Sinai days later. Petrol rationing hit Britain that same month and lasted until May 1957.
Why It Still Matters
Suez proved that a canal, and the oil moving through it, could outweigh three invading armies. Britain won the war and lost the argument in under two weeks, not because it ran out of soldiers, but because Washington controlled the credit line. Every energy chokepoint since has been read through that lens. The barrel doesn't need to fire a shot. It just needs someone else to need it more.