The first time he said that he would lose his good name in France if he blew the horn; the second time, that it would mean infamy for his family and contempt for France; the third time he said that his relatives should never hear the accusation that Roland blew the horn on account of pagans.

Hi... So why Roland refuses to called for help ? "The scheme proceeds as planned: as Charlemagne's army travels homeward, through the Roncevaux pass in the Pyrenees, Roland and the rear guard, which includes the finest knights of France, are ambushed by Marsile's army. Oliver, Roland's closest friend and a brave warrior in his own right, thrice begs his friend to sound his oliphant, or horn, to summon the aid of Charlemagne's main troop. Despite their forces being outnumbered five to one, Roland three times refuses, citing his desire to preserve his family honor and his determination to win alone. "