Read for yourself the chief accounts upon which the millennium celebration is based; while these much-loved chronicles admittedly contain a good bit of legend, they are still the best history we have.
Though practically unknown to most Westerners, the history of Orthodox spirituality among the Eastern Slavs of Ukraine and Russia is a deep treasure chest of spiritual exploration and discovery.
Why, all of a sudden, would an officially atheistic confederation of republics like the USSR choose to celebrate, in full pomp and grandeur, a thousand years of Christianity on its soil?
Russia and the surrounding Slavic countries were at one time considered among the "most Christian" of nations. So where was the church during the revolution that made the USSR atheistic?