The Treaty of Orebro on 18 July 1812 marked the end of both the Anglo-Russian and the Anglo-Swedish Wars. The French armies was at the same time advancing into Russia and it was necessary to end the wars and instead create a union against France and its allies. Bentinck had family connections in the Russian court and he also seems to have had a good relation to the Swedish Crown Prince Carl Johan Bernadotte. He made several journeys between St Petersburg and Stockholm. He took initiative to the meeting in August at the city of Åbo between Tsar Alexander I and the Swedish Crown Prince Bernadotte. It is not known if he had a mission from the British government or if he acted on his own.