Tarzan, Lord of the Jungle by Edgar Rice Burroughs

Nerve shaken, the remnants of Ibn Jad's company turned toward the west and hastened by forced marches to escape the hideous forest of the jin. Abd el-Aziz and those who had accompanied him from the Wood of the Leopards toward Nimmr had not rejoined them. Nor ever would they, for upon the plain below the treasure city of the Beduins' dreaming the knights of Gobred had discovered them and, despite the thundering havoc of the ancient matchlocks, the iron Knights of Nimmr had couched their spears against the Saracens and once again the victorious cri de guerre of the Crusaders had rung out after seven centuries of silence to announce a new engagement in the hoary war for the possession of the Holy Land -- the war that is without end.

From the north a mailed knight rode down through the forests of Galla land. A blue and silver pennon fluttered from his lance. The housings of his great charger were rich with gold and silver from the treasure vaults of Wildred of the Sepulcher. Wide-eyed Galla warriors viewed this solitary anachronism from afar, and fled.