Explanation: During the Suez Crisis in 1956, France and the UK, assisted by Israel, attempted to seize the Suez Canal from Egypt in order to preserve their influence over trade going through the Suez. Egypt was not fond of this idea, but despite putting up a fight, ultimately could not resist the military force of the two European empires and Israel.
Fortunately, this was during a period of intense decolonization, and the USA and the USSR - for both practical and ideology reasons - both shared an interest in seeing the old order of outright colonialism destroyed. The USSR threatened to bomb the UK, France, and Israel; while the US threatened to crash the British economy, and, along with the other members of NATO, refused to sell oil to France or Britain, compounding the crisis from an oil embargo from the Arab states. Nearly every country in the UN (other than France, Britain, and Israel) condemned the invasion.
This pressure managed to force a withdrawal of the three states, preserving Egypt's sovereignty - a rare moment of Cold War international unity, and with a good outcome at that!