The Suez Crisis is when the British, French, and Israeli governments conspired behind the back of the US to invade Egypt and install a puppet regime. With the goal of taking back the canal and stealing their oil supply.
Pretty much the same thing Putin just attempted in Ukraine.
It's to Eisenhower's credit that he didn't back their immoral attack. And one of the big wins for the morality of US foreign policy in the 20th century.