A year before Marx’s death, in the 1882 Russian edition of the manifesto:

And now Russia! During the Revolution of 1848-9, not only the European princes, but the European bourgeois as well, found their only salvation from the proletariat just beginning to awaken in Russian intervention. The Tsar was proclaimed the chief of European reaction. Today, he is a prisoner of war of the revolution in Gatchina, and Russia forms the vanguard of revolutionary action in Europe.