40 years ago Israel fought Egypt and Syria in the 1973 Yom Kippur War. Israel was on the ropes and needed a resupply from the United States. Nixon hesitantly agreed to resupply Israel. This infuriated the Arab World that they instituted a boycott of the West. In other words, they stopped shipping oil from their hellholes to Western nations. A move that can happen again.
On October 6, 1973, Yom Kippur (the Day of Atonement), the holiest day on the Jewish religious calendar, Egypt and Syria took advantage of optimal circumstances to launch attacks that took Israel by surprise. So complete was the element of surprise that when war erupted, Israel was only beginning to mobilize the reserve forces which form the bulk of the IDF. The thin forces stationed along the two fronts had to contain the invading armies until the IDF was prepared to meet them in force. The IAF was hampered by the dense anti-aircraft missile system which the enemy had deployed close to the front.