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Pompey believed that these territories could be effectively directly ruled by Rome. After the death of Mithridates in 63, he established a series of client kingdoms. He made his protégé Tigranes king in Armenia, who paid Pompey very well for the honor. The Roman General also turned the Bosphoran Kingdom in the Crimea into a client state, it would stay a client of Rome until the mid-4th century. Pompey also established a series of protectorates in the Caucuses, such as Colchis (modern Georgia) on the Black Sea. These client kingdoms and protectorates created a defensive frontier system that was to last for more than half a millennium. Pompey was the architect of the Roman East and this is regarded as his greatest achievement. However, he is widely blamed for a great diplomatic mistake. During his conquest of the Roman East he met with envoys of the Parthian Empire. This was a large empire based, in modern Iran and Iraq, that had a formidable army. The Parthian King offered Rome a peace treaty but Pompey rejected this with great arrogance. Many at the time believed that this led to many conflicts between Rome and the Parthian Empire, in subsequent decades and centuries <ref> Goldsworthy, p. 156</ref>.

===Pompey and the Roman Food Supply===