...dark, he held his semicircular line against repeated assaults of the enemy, with a heroic valor that earned him the sobriquet of The Rock of Chickamauga. At night, Thomas retired, under orders, to Rossville , half way to Chattanooga. The President was of course greatly disappointed when Rosecrans telegraphed that he had met a serious disaster, but this disappointment was mitigated by the quickly fol...