They say that hindsight is 20/20. That is, it is easy to figure out something after the fact, even if it was unclear at the time.

Look at 9/11. On August 6th, 2001, President Bush received a Presidential Daily Brief (PDB) titled “Bin Laden Determined to Strike in US”. Sounds pretty clear to us now, right? But think about it: the President of the United States probably has documents like this coming across his desk all of the time. It’s a big world and a lot of people out there don’t like us. That particular PDB didn’t mention anything specific about the 9/11 plots. It was just another radical out there looking to do harm to the US. Nothing new.

It’s a similar situation when people look back in hindsight at the intel Israel had in the days leading up to October 7th, 2023, the bloodiest day in Israeli history.

The intelligence failures leading up to the Hamas attacks on October 7, 2023, have sparked intense scrutiny within Israel. Despite its reputation for having some of the most sophisticated intelligence agencies in the world, such as AMAN (Israel’s military defense directorate) and Shin Bet (Israel’s security agency), Israel was caught off guard by the scale and brutality of the assault.

Body Bags Israel
The bagged remains of victims killed in Israel on October 7th, 2023. They sit in the courtyard behind the National Forensic Pathology Center in Tel Aviv. Image Credit: Aaron Poris

One of the major issues was a misinterpretation of Hamas’ goals and capabilities. Many in the Israeli intelligence community believed that Hamas, due to its quasi-governance role in Gaza, had shifted toward a more pragmatic stance. This assumption was reinforced by Hamas’ decision not to engage in armed clashes during recent conflicts between Israel and Palestinian Islamic Jihad. Israeli security officials viewed this as evidence that Hamas preferred to focus on maintaining its authority in Gaza rather than launching a full-scale attack. It is here where I stop and remind you of some of the best advice I ever got when I was a young military leader. “Assumptions are the mother of all screw-ups.” Remember that, because it’s true. Assume nothing.

The Consequences of Underestimating Hamas

A full year before the attacks of October 7th, Israeli intelligence obtained a 40-page document detailing Hamas’ attack plans. The document was codenamed “Jericho Wall” and was distributed among senior military and government officials. Ultimately it was dismissed as aspirational…wishful thinking. Leaders assumed Hamas could never successfully execute such an audacious plan.

This brings me to the profoundly wise words of Sun Tzu, in The Art of War, one of the first books I was given as a new military cadet:

“If you know the enemy and know yourself, you need not fear the result of a hundred battles. If you know yourself but not the enemy, for every victory gained you will also suffer a defeat. If you know neither the enemy nor yourself, you will succumb in every battle.”