In this struggle the Tlascalans received an important support in the accession of the Othomis, or Otomies,--as usually spelt by Castilian writers,--a wild and warlike race originally spread over the table-land north of the Mexican Valley. A portion of them obtained a settlement in the republic, and were speedily incorporated in its armies. Their courage and fidelity to the nation of their adoption showed them worthy of trust, and the frontier places were consigned to their keeping. The mountain barriers by which Tlascala is encompassed afforded many strong natural positions for defence against invasion. The country was open towards the east, where a valley, of some six miles in breadth, invited the approach of an enemy. But here it was that the jealous Tlascalans erected the formidable rampart which had excited the admiration of the Spaniards, and which they manned with a garrison of Otomies. Efforts for their subjugation were renewed on a greater scale after the accession of Montezuma. His victorious arms had spread down the declivities of the Andes to the distant provinces of Vera Paz and Nicaragua,[112] and his haughty spirit was chafed by the opposition of a petty state whose territorial extent did not exceed ten leagues in breadth by fifteen in length.[113] He sent an army against them under the command of a favorite son. His troops were beaten, and his son was slain. The enraged and mortified monarch was roused to still greater preparations. He enlisted the forces of the cities bordering on his enemy, together with those of the empire, and with this formidable army swept over the devoted valleys of Tlascala. But the bold mountaineers withdrew into the recesses of their hills, and, coolly awaiting their opportunity, rushed like a torrent on the invaders, and drove them back, with dreadful slaughter, from their territories.