 Complete the following phrase:  In the next few years, having secured mainland Iran, the new Iranian king set out to reconquer the Caucasus and to re-impose its traditional suzerainty over the region. After Heraclius II refused to denounce the treaty with Russia and to voluntarily reaccept Irans suzerainty in return for peace and prosperity for his kingdom, Agha Mohammad Khan invaded Kartli-Kakheti, 