Horses, once present in North America, became extinct on the continent approximately 10,000 years ago. Before the arrival of the Spanish, the only pack animal the Native Americans on the Plains had at their disposal was dogs. After the Spaniards introduced horses to Plains Native Americans, the lives of the tribes changed. Tribes became less settled and sedentary. The horse allowed them to hunt animals such as bison or buffalo, and, instead of staying in one place, tribes began to be nomadic. Their desire to hunt and their ability to roam over greater stretches of land also put them into greater conflict with other tribes, leading to increased warfare. It became a badge of honor to steal horses from neighboring tribes, and warriors were honored. Some tribes were able to become adept mounted warriors and take over land from other tribes. With the ability to hunt, the population of Plains tribes, including the Kiowa, Cheyenne, Lakota Sioux, Comanche, and others, grew, as did their affluence, to new levels. With greater ability to trade, they had access to new items, such as blankets, larger teepees, and firearms. As some tribes developed a greater ability to use the horse, some tribes (such as the Comanche) had more power than others.