The growing popularity of peace medals compelled regulation, and as a result, presidential medals, in comparison to early peace medals given alongside treaties, were increasingly awarded to select individuals. A report issued in 1908 by the Senate Committee on Indian Affairs, for example, recommended the passage of a bill that awards medals to a group of Indian policemen who arrested Sitting Bull, the Sioux chief, near Fort Yates in 1890. Additionally, Meriwether Lewis and William Clark famously distributed about eighty-seven peace medals, many of which were issued under Jefferson, to Indian leaders during their 1803-1806 expedition across the United States as demonstrations of goodwill from the government.