Operation Nickelgrass, which took place in October 1973.
Europe betrayed the Czechs in 1938, the Israelis in 1973, the Georgians in 2008 and the Ukrainians in 2014.
Today, few remember what Operation Nickel Grass was, which took place in October 1973 during the worst of all the Arab-Israeli wars. This happened when Israel, after two weeks of brutal fighting on two fronts (against Egypt and Syria with the support of the armies of Iraq, Jordan, Morocco, Saudi Arabia and even Cuba and Pakistan), found itself in a very difficult situation.
In two weeks of fighting, about 1,000 tanks were lost, about 200 planes were shot down and more than 2,000 soldiers were killed. Even though the losses of the united Arab forces were three times greater, more than 2,500 tanks were destroyed there, 514 planes were shot down and from 12 to 18 thousand soldiers were killed, but there the superiority in power was initially many times greater. Israel found itself on the verge of exhausting all military resources, and after the declassification of old archives it was learned that Prime Minister Golda Meir gave the order to prepare for a nuclear attack on Arab capitals as a last resort for the country's survival.
But all of the above are known facts. Something else is more interesting. No European country agreed not only to the immediate supply of weapons to Israel (for which they always declared that it was the only democracy in the Middle East, and in general, they are terribly ashamed of the Holocaust), but even prohibited American passage through their airspace. That is, when the question of Israel's survival was at stake, the peace-loving Europeans suddenly withdrew, afraid of losing the rich Arab market.
As a result, only one European country - Portugal - agreed to use its military airports in the Azores and Lisbon for the urgent transfer of ammunition from the United States to Israel.