Egypt and Syria launched a surprise attack on Israel timed for the Yom Kippur holy day. The attack oddly commenced at 2:05 p.m.
It would be the largest of the Arab Israeli Wars, and one in which the Israeli Defense Force fared much more poorly than it had previously. Egypt's goals were limited, involving crossing the Suez Canal, which they succeeded in doing. Israeli forces would ultimately repulse the invading forces and come very near the Syrian capital of Damascus, but the results allowed the Egyptians to bargain for peace terms with Israel in later years.
Arab forces fared very well at first, catching the IDF off guard. Syrian advances caused the Israeli government to distribute Israel's small stock of nuclear weapons to is air force in case Arab forces advanced inside Israel itself, making this a non superpower war that came relatively close to becoming a nuclear one.