Further, Landa makes the statement that bows and arrows, which were universal in Yucatan at the conquest, were introduced there by the Mexicans, and that the Yucatec before they came into contact with the latter were ignorant of these weapons. It may be conjectured that their introduction was due to the Mexican mercenaries employed by the later rulers of Mayapan. To turn for the moment to the Quiché and Kakchiquel, we find that “arrows” were employed by the former in their wars with the surrounding tribes shortly after the death of the original leaders, but it is possible that these may in reality have been throwing-spears. With regard to the Kakchiquel the case is different; this people are always, in the Annals of Xahila, insisting upon their status as a warrior tribe, and it is stated definitely that the only riches which their fighting-men bore with them from Tulan were their bows, their bucklers and their rounded shields. Now both the Tutul Xiu and the Quiché traced their origin from Tulan also, and if this be taken to indicate some early contact with the Mexican valley, it follows that the Tutul Xiu migration started before the introduction of the bow into the valley by the Chichimec, while that of the Quiché and Kakchiquel occurred subsequently. However, as stated above, the Tulan of the Tutul Xiu tradition is not necessarily that of the Quiché and Kakchiquel legends (see pp. 214–216). According to Landa the bows of the historical Yucatec were solid and straight, a little less than a man’s height, while the arrows, carried in a quiver, had shafts of reed, foreshafts of wood and obsidian heads; the Yucatec also carried stone-headed spears, copper-bladed axes, the edges of which were hardened by hammering, and basket-work shields covered with deer-hide. The spear remained the weapon of the upper class, while the bow, as the arm of the mercenary, was used by the commoners. Corslets, quilted with cotton and salt, are mentioned as defensive armour, and Diaz speaks of slings and “swords” (probably corresponding to the Mexican macquauitl) at Cape Cotoche and Champoton respectively. The Maya forces were under the command of two generals, one elected for three years and called Nacon (see p. 259), the other hereditary. The generals maintained a force of regular soldiers, whose food in times of peace was provided by the commune. Palisades were practically the only defensive works known, and in fact very few of the buildings throughout the Maya country, with the exception of a few in western Guatemala, where traces of fortifications are seen on the summits of mountains, seem adapted for defensive purposes. The Yucatec carried off the jaw-bones of slain foes to be worn as armlets, a custom also found in New Guinea. Axes and clubs were used by the Quiché and Kakchiquel, and the latter also employed slings and blow-guns. In later Guatemala mention is made by Alvarado of long wadded corslets