We have seen that the history of military rule in Japan embraces nearly the whole period of authentic history, down to modern times, and closes with the second period of national integration. The first period had been reached when the clans first accepted the leadership of the chief of the greatest clan,--thereafter revered as the Heavenly Sovereign, Supreme Pontiff, Supreme Arbiter, Supreme Commander, and Supreme Magistrate. How long a time was required for this primal integration, under a patriarchal monarchy, we cannot know; but we have learned that the later integration, under a duarchy, occupied considerably more than a thousand years.... Now the extraordinary fact to note is that, during all those centuries, the imperial [280] cult was carefully maintained by even the enemies of the Mikado; the only legitimate ruler being, in national belief, the Tenshi, "Son of Heaven,"--the Tenno, "Heavenly King." Through every period of disorder the Offspring of the Sun was the object of national worship, and his palace the temple of the national faith. Great captains might coerce the imperial will; but they styled themselves, none the less, the worshippers and slaves of the incarnate deity; and they would no more have thought of trying to occupy his throne, than they would have thought of trying to abolish all religion by decree. Once only, by the arbitrary folly of the Ashikaga shogun, the imperial cult had been seriously interfered with; and the social earthquake consequent upon that division of the imperial house, apprised the usurpers of the enormity of their blunder.... Only the integrity of the imperial succession, the uninterrupted maintenance of the imperial worship, made it possible even for Iyeyasu to clamp together the indissoluble units of society.