Bar-Joseph spends much of the book addressing whether “the Angel” was genuine. After all, Ashraf Marwan (a.k.a. “the Angel”) was the son-in-law of Egyptian President Gamal Nasser and a close adviser to President Sadat. Marwan started in 1970 as a “walk-in,” offering Egypt’s order-of-battle to Mossad officers in London. A skeptic could not be blamed for thinking there was something too good to be true about Marwan, but the author makes a good case that sometimes intelligence services get lucky.
Most persuasively, Bar-Joseph argues the nature of the intelligence Marwan gave the Israelis was simply too destructive of Egyptian interests. From the start, the Angel gave Israel not “seed corn”—intelligence that was true but of marginal consequence—but highly damaging, order-of-battle information. As the outbreak of the Yom Kippur War would eventually show, Marwan provided accurate intelligence about how the Egyptian military would conduct itself and the signs to watch for in its battle preparations a year before the attack, giving Israel plenty of time to ready its defenses.
Divisions in the intelligence ranks contributed to Israel’s being less prepared to halt a Sinai crossing than a Syrian takeover of the Golan Heights. After Prime Minister Meir gave mobilization orders, having received Marwan’s convincing intelligence about an imminent attack, the director of military intelligence told the military commander in the Sinai that he still didn’t believe Sadat would fight a limited war. As a result, this commander did not take the orders seriously; however, his counterpart in the north did—and took action. This saved Israel from having to begin a major and bloody campaign to retake the Golan Heights, and freed up forces to counterattack in the Sinai desert, where Egyptian forces crossed the Suez Canal and made major inroads into the Sinai Peninsula.
The Yom Kippur War came as a surprise to the US Intelligence Community, where analysts shared the consensus Israeli Military Intelligence view that a major Egyptian attack was unlikely in 1973. However, US analysts did at least entertain the possibility that Sadat had adopted the more limited war aims about which Marwan had warned the Israelis.
Like their Israeli counterparts, US analysts as late as October could not shake the compelling logic of Egypt’s only fighting a winnable war, which they were in no position to launch.