What did Pompey celebrate in his third triumph in 61 BCE?

Pompey the Great’s third triumph, held in 61 BCE, was a celebration of his extensive reorganization of the Roman East. Following his successful military campaigns, which included the defeat of Mithradates and the consolidation of Roman power in the region, Pompey established a new administrative framework that defined the Roman frontier for centuries.1

During this period, he annexed Syria, created the provinces of Bithynia-Pontus and Cilicia, and established a system of protectorates that extended to the Caucasus and the Black Sea. This comprehensive settlement, which also involved managing dependent states like Judaea and Armenia, was considered his greatest achievement, and the triumph served to trumpet the grandeur of these accomplishments to the Roman public.1