Great Martyr Vladimir of Kiev and the Holy New Martyrs of Russia

I am reminded that today is the Feast of the Great New Martyr Vladimir of Kiev (+1918), the proto-martyr of the Communist persecution.  And this Sunday is the Synaxis of the New Martyrs of Russia.  We will never know the precise number of those martyred during what is indisputably the greatest persecution in the history of Christendom, but it is certainly in the millions.  Obviously it is not possible to identify more than a small percentage of these holy martyrs.  Thus the feast commemorating the millions whose names are lost to history but not God.