Israel has unfortunately had to fight many wars. The most traumatic was the Yom Kippur War, in which the Arabs from Egypt and Syria surprised the IDF and attacked on the holiest day of the year, Yom Kippur, October 6, 1973.
The war was considered a failure for Israel because of the misreading of the intelligence beforehand. Israel was duped by the disinformation by Egypt and once they did realize that a war was imminent they did not attack first (some say due to American pressure). Although Israel fought back relatively quickly, the fact that so many Israeli soldiers fell – 2,688 has marked this war as a spectacular failure. The one bright spot was the success of the Israeli Navy, which secured the coast and sank 34 enemy vessels without a loss.
For those of you who can read Hebrew, there is an internet site devoted to the Yom Kippur War and the stories told by individual soldiers.
For a recap see the videos below: