According to the Wikipedia page on the War of Bavarian Succession, Catherine the Great would have supported Frederick.
Austria backed down due to the threat of war with Russia, but maybe wouldn't have if they had been assured of French support. So without France declaring war on Britain, you could have had a large continental war in Europe.
Austria backed down due to the threat of war with Russia, but maybe wouldn't have if they had been assured of French support. So without France declaring war on Britain, you could have had a large continental war in Europe.