councils. Be accessible to no-one. Share with few your most intimate plans." To defeat these dangerous revolts, Basil formed an alliance with Prince Vladimir I of Kiev, who in 988 had captured Chersonesos, the Empire's main base in the Crimean Peninsula. Vladimir offered to evacuate Chersonesos and to supply 6,000 of his soldiers as reinforcements to Basil. In exchange, he demanded to be married to Basil's younger sister Anna. At first, Basil hesitated. The Byzantines viewed all of the peoples of Northern Europe—namely Franks and Slavs—as barbarians. Anna objected to marrying a barbarian ruler because such a marriage would have no precedent in Imperial annals. Vladimir had researched various religions, having sent delegates to various countries. Marriage was not his main reason for choosing Christianity. When Vladimir promised to baptize himself and to convert his people to Christianity, Basil finally agreed. Vladimir and Anna were married in Crimea in 989. The Rus' warriors taken into Basil's army were instrumental in ending the rebellion; they were later organized into the Varangian Guard. This marriage had important long-term implications, marking the beginning of the process by which the Grand Duchy of Moscow many centuries later would proclaim itself "The Third Rome", and claim the political and cultural heritage of the Byzantine Empire. Campaigns against the Fatimid Caliphate Once the internal strife was quelled, Basil turned his attention to the Empire's other enemies. The Byzantine civil wars had weakened the Empire's position in the east, and the gains of Nikephoros II and John I had nearly been lost to the Fatimid Caliphate. In 987–988, a seven-year truce with the Fatimids was signed; it stipulated an exchange of prisoners, the recognition of the Byzantine emperor as protector of Christians under Fatimid rule and of the Fatimid Caliph as protector of Muslims under Byzantine control, and the replacement of the name of the Abbasid caliph with that of the Fatimid caliph in the Friday prayer in the mosque at Constantinople. This lasted until the long-time vizier Yaqub ibn Killis died in 991. Fatimid caliph Al-Aziz Billah chose to pursue a more aggressive stance in Syria and appointed Manjutakin as governor of Damascus. Manjutakin's attacks, and Basil's first expedition to Syria Encouraged by the defectors after the death of emir Sa'd al-Dawla, Al-Aziz decided to renew his attacks on the Hamdanid Emirate of Aleppo, a Byzantine protectorate, perhaps expecting Basil would not interfere. Manjutakin invaded the