To commemorate the 41st anniversary of the October 1973 war, Israel State Archives has made public a series of recently declassified telegrams exchanged between Prime Minister Golda Meir’s office and the Israel embassy in Washington just before and during the outbreak of what would prove a decisive and traumatic conflict. Awakened at 3:50 a.m. on the morning of October 6, Meir received intelligence of a planned Egyptian and Syrian attack that evening. From the timeline provided by the Archives:

At 10:15 a.m. Golda Meir met with the American ambassador in Israel, Kenneth Keating, and updated him on the situation. In reply to a direct question, Golda promised that Israel would not initiate a pre-emptive strike, “although it would make the situation much easier for us”; but Egypt and Syria should be aware that Israel knew of their plans and would repel the attacks and hit back hard. She expressed confidence in Israeli victory, and suggested that the US should still try to talk to the Egyptians and the Soviets in order to prevent the outbreak of war, as reported in a telegram to the embassy in Washington.

Early Friday morning, Israel attacked military installations near the Iranian cities of Isfahan and nearby Natanz, the latter being one of the hubs of the country’s nuclear program. Jerusalem is not taking credit for the attack, and none of the details are too certain, but it seems that the attack involved multiple drones, likely launched from within Iran, as well as one or more missiles fired from Syrian or Iraqi airspace. Strikes on Syrian radar systems shortly beforehand probably helped make the attack possible, and there were reportedly strikes on Iraq as well.

Iran itself is downplaying the attack, but the S-300 air-defense batteries in Isfahan appear to have been destroyed or damaged. This is a sophisticated Russian-made system positioned to protect the Natanz nuclear installation. In other words, Israel has demonstrated that Iran’s best technology can’t protect the country’s skies from the IDF. As Yossi Kuperwasser puts it, the attack, combined with the response to the assault on April 13,

clarified to the Iranians that whereas we [Israelis] are not as vulnerable as they thought, they are more vulnerable than they thought. They have difficulty hitting us, but we have no difficulty hitting them.

Nobody knows exactly how the operation was carried out. . . . It is good that a question mark hovers over . . . what exactly Israel did. Let’s keep them wondering. It is good for deniability and good for keeping the enemy uncertain.

The fact that we chose targets that were in the vicinity of a major nuclear facility but were linked to the Iranian missile and air forces was a good message. It communicated that we can reach other targets as well but, as we don’t want escalation, we chose targets nearby that were involved in the attack against Israel. I think it sends the message that if we want to, we can send a stronger message. Israel is not seeking escalation at the moment.