The brilliance of these new visions did not, however, blind Alexander to the obligations of friendship, and he refused to retain the Danubian principalities as the price for suffering a further dismemberment of Prussia. "We have made loyal war", he said, "we must make a loyal peace". It was not long before the first enthusiasm of Tilsit began to wane. The French remained in Prussia, the Russians on the Danube, and each accused the other of breach of faith. Meanwhile, however, the personal relations of Alexander and Napoleon were of the most cordial character, and it was hoped that a fresh meeting might adjust all differences between them. The meeting took place at Erfurt in October 1808 and resulted in a treaty that defined the common policy of the two Emperors. But Alexander's relations with Napoleon nonetheless suffered a change. He realised that in Napoleon sentiment never got the better of reason, that as a matter of fact he had never intended his proposed "grand enterprise" seriously, and had only used it to preoccupy the mind of the Tsar while he consolidated his own power in Central Europe. From this moment the French alliance was for Alexander also not a fraternal agreement to rule the world, but an affair of pure policy. He used it initially to remove "the geographical enemy" from the gates of Saint Petersburg by wresting Finland from Sweden (1809), and he hoped further to make the Danube the southern frontier of Russia.