The Israeli Air Force has long been dominant over the skies of the Middle East. They have superb pilots and they use their planes very well. There was a time, however, when that dominance was challenged – and it was arguably Israel's darkest hour.
In 1973, Israel stood triumphant in the Middle East. For a quarter-century, it had fended off efforts to wipe it off the map. But on Yom Kippur, Egyptian and Syrian forces launched an attack. To protect their armored forces, the Egyptian-Syrian forces used a combination of two Soviet-designed systems: The SA-6 "Gainful" surface-to-air missile and the ZSU-23-4 "Shilka."
The latter system was truly deadly, considering Israeli tactics. Radar-guided and with four 23mm cannon capable of firing as many as 1,000 rounds per minute, the ZSU-23-4 was able to hit targets almost two miles away. Many Israeli pilots in A-4 Skyhawks, Mirage IIIs, Neshers, and F-4 Phantoms soon found out the hard way that flying low to avoid surface-to-air missiles was hazardous. In one strike, six aircraft were lost taking out a missile battery.
The Israelis eventually came up with workarounds to defeat the SA-6/ZSU-23 combo, but they needed aircraft replacements from the United States, due to losing roughly 100 aircraft. The Israelis would learn their lesson, and in 1982, Syrian forces found themselves on the wrong end of a turkey shoot.
Having proven itself in combat, the ZSU-23-4 was widely exported. As of 2014, 39 countries use this system to provide tactical air defense for their forces. Russia has since replaced the ZSU-23 in front-line units with the 2S6 Tunguska and the Pantsir gun-missile combo systems but this mobile gun will forever be known for the time it almost chased one of the best air forces in the world from the skies over a battlefield.