Sviatoslav's War against the Byzantines, (970-971).
After defeating all of their common enemies, the Bulgarian Prince Sviatoslav and his Kievan Rus armies who had planned to turn on the Byzantines after the job was done, were soon confronted by the Byzantines at Arcadiopolis and Dorostolon by Bardas Skleros, Peter and John I Tzimiskes respectively who were also planning to betray Sviatoslav so they were ready for the war. Surprisingly the Bulgarians and Rus who conquered many territories with ease before, succumbed to the Byzantine armies rather quickly, even after forming an alliance with the Magyars and Pechenegs they were unsuccessful and their allies were crushed by the Byzantines as well.
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