In the Treaty of Georgievsk (1783) Russia agreed to protect Georgia against any new invasion and further political aspirations of their Persian suzerains. Catherine waged a new war against Persia in 1796 after they, under the new king Agha Mohammad Khan, had again invaded Georgia and established rule in 1795 and had expelled the newly established Russian garrisons in the Caucasus. The ultimate goal for the Russian government, however, was to topple the anti-Russian shah (king), and to replace him with a half-brother, Morteza Qoli Khan, who had defected to Russia and was therefore pro-Russian.