a sizeable number. The French explorer Claude Charles Du Tisne found 300 horses among the Wichita on the Verdigris River in 1719, but they were still not plentiful. Another Frenchman, Bourgmont, could only buy seven at a high price from the Kaw in 1724, indicating that horses were still scarce among tribes in Kansas. While the distribution of horses proceeded slowly northward on the Great Plains, it moved more rapidly through the Rocky Mountains and the Great Basin. The Shoshone in Wyoming had horses by about 1700 and the Blackfoot people, the most northerly of the large Plains tribes, acquired horses in the 1730s. By 1770, Plains horse culture was established, consisting of mounted bison-hunting nomads from Saskatchewan and Alberta southward nearly to the Rio Grande. Soon afterward, pressure from Europeans and Euro-Americans on all sides and European diseases caused its decline. It was the Comanche, coming to the attention of the Spanish in New Mexico in 1706, who first realized the potential of the horse. As nomads, hunters, and pastoralists, well supplied with horses, they swept most of the mixed-economy Apaches from the plains and by the 1730s were dominant in the Great Plains south of the Arkansas River. The success of the Comanche encouraged other Indian tribes to adopt a similar lifestyle. The southern Plains Indians acquired vast numbers of horses. By the 19th century, Comanche and Kiowa families owned an average of 35 horses and mules each – and only six or seven were necessary for transport and war. The horses extracted a toll on the environment as well as required labor to care for the herd. Formerly egalitarian societies became more divided by wealth with a negative impact on the role of women. The richest men would have several wives and captives who would help manage their possessions, especially horses. The milder winters of the southern Plains favored a pastoral economy by the Indians. On the northeastern Plains of Canada, the Indians were less favored, with families owning fewer horses, remaining more dependent upon dogs for transporting goods, and hunting bison on foot. The scarcity of horses in the north encouraged raiding and warfare in competition for the relatively small number of horses that survived the severe winters. The Lakota, also called Teton Sioux, enjoyed the happy medium between North and South and became a dominant Plains tribe by the mid-19th century. They had relatively small