A weakened and bankrupted royal court under Fath Ali Shah was forced to sign the notorious Treaty of Gulistan in 1813, followed by the Treaty of Turkmenchay after efforts by Abbas Mirza failed to secure Persia's northern front against Imperial Russia. The treaties were prepared by the notorious (in Iran) Sir Gore Ouseley with the aid of the British Foreign Office in London. Sir Gore Ouseley was the younger brother of the British orientalist William Ouseley, who served as secretary to the British ambassador in Persia.'

These treaties are worth looking at more closely, as they are highly important for the subsequent development of Iran, although, of course, few British (or even Russian) people have ever heard of them.

First: the Treaty of Gulistan.

'The Treaty of Gulistan (Russian: Гюлистанский договор; Persian: عهدنامه گلستان) was a peace treaty concluded between Imperial Russia and Persia on October 24, 1813 in the village of Gulistan (in modern-day Goranboy Rayon of Azerbaijan) as a result of the first Russo-Persian War. The peace negotiations were precipitated by Lankaran's fall to Gen. Pyotr Kotlyarevsky on January 1, 1813.
The treaty confirmed inclusion of modern day Azerbaijan, Daghestan and Eastern Georgia into the Russian Empire.
The text was prepared by the British diplomat Sir Gore Ouseley who served as the mediator and wielded great influence at the Persian court.'

(Note: this makes clear another point that should be self-evident but isn't: that Russia, even despite the Great Game, has always been part of Europe. Always. It is simply false to see it as being 'outside' the European heartland).

Next: the Treaty of Turkmenchay.

'The Treaty of Turkmenchay (Russian: Туркманчайский договор; Persian: عهدنامه ترکمنچای) was a treaty negotiated in Turkmenchay by which the Persian Empire, more commonly known today as Iran, recognized Russian suzerainty over the Erivan khanate, Nakhchivan khanate and the remainder of the Talysh khanate, establishing the Araks River as the common boundary between both empires, after its defeat in 1828 at the end of the Russo-Persian War, 1826-1828.
The treaty was signed on February 21, 1828 by Haj Mirza Abol-hasan Khan and Asef o-dowleh, chancellor of Fath Ali Shah on behalf of Persia, and General Ivan Paskievich representing Imperial Russia. As was the case for the Treaty of Gulistan, Persia was forced to sign the treaty by Russia, as it had no alternative after crown prince Abbas Mirza's defeat. The Russian general had threatened Fath Ali Shah that he would conquer Tehran in five days unless the treaty was signed.'

The end result?