During the night of October 5/6, Zvi Zamir went to Europe to meet personally with Ashraf Marwan, an Egyptian double agent. Marwan informed Zamir that a joint Egyptian-Syrian attack was imminent. Combined with other warnings and incidents, Marwan's warning finally convinced Zvi Zamir of the imminence of war. Eli Zeira, the director of Aman, sent a definite warning of war to the Israeli leadership at 04:30 on October 6. Aman erred when it concluded the Arabs were to attack at 18:00, an estimation in fact four hours late. Israel's Prime Minister Golda Meir met with Defence Minister Moshe Dayan and General David Elazar at 08:05 for over an hour. Meir asked both men to present their views, which were conflicting: Dayan continued to believe war was not a certainty, while Elazar believed otherwise, arguing for a preemptive air strike against Syria. Dayan also proposed a partial mobilization of reserves, while Elazar favored a mobilization of the entire Air Force, and four armored divisions, totaling around 100,000–120,000 troops. Meir concluded the meeting by stating that no preemptive strike would be launched, in order to ensure the backing of the United States, but she sided with Elazar on the issue of mobilization, and orders were issued to reservists to mobilize.