The individual's prestige and status was judged by the number of horses that he could give away. For the Indians who lived on the Plains, the principal value of property was to share it with others. After having driven the hostile Shoshone and Arapaho from the Northwestern Plains, the Niitsitapi began in 1800 a long phase of keen competition in the fur trade with their former Cree allies, which often escalated militarily. In addition both groups had adapted to using horses about 1730, so by mid-century an adequate supply of horses became a question of survival. Horse theft was at this stage not only a proof of courage, but often a desperate contribution to survival, for many ethnic groups competed for hunting in the grasslands. The Cree and Assiniboine continued horse raiding against the Gros Ventre (in Cree: "Pawistiko Iyiniwak" – "Rapids People" – "People of the Rapids"), allies of the Niitsitapi. The Gros Ventres were also known as "Niya Wati Inew", "Naywattamee" ("They Live in Holes People"), because their tribal lands were along the Saskatchewan River Forks (the confluence of North and South Saskatchewan River). They had to withstand attacks of enemies with guns. In retaliation for Hudson's Bay Company (HBC) supplying their enemies with weapons, the Gros Ventre attacked and burned in 1793 South Branch House of the HBC on the South Saskatchewan River near the present village of St. Louis, Saskatchewan. Then, the tribe moved southward to the Milk River in Montana and allied themselves with the Blackfoot. The area between the North Saskatchewan River and Battle River (the name derives from the war fought between these two tribal groups) was the limit of the now warring tribal alliances. Blackfoot war parties would ride hundreds of miles on raids. A boy on his first war party was given a silly or derogatory name. But after he had stolen his first horse or killed an enemy, he was given a name to honor him. Warriors would strive to perform various acts of bravery called counting coup, in order to move up in social rank. The coups in order of importance were: taking a gun from a living enemy and or touching him directly; capturing lances, and bows; scalping an enemy; killing an enemy; freeing a tied horse from in front of an enemy lodge; leading a war party; scouting for a war party; stealing headdresses, shields, pipes (sacred ceremonial pipes); and driving a herd of stolen horses back to camp.