to go down the Missouri to Grand River in order to meet Ashley and buy horses from the Arikara, but warning him of the Native Americans' hostility to whites. They had recently had a skirmish with men from the Missouri Fur Company. Ashley, who was bringing supplies as well as 70 new men up the river by boat, met Smith at the Arikara village on May 30. They negotiated a trade for several horses and 200 buffalo robes. They planned to leave as soon as possible to avert trouble, but weather delayed them. An incident precipitated an Arikara attack on the Ashley party. Forty Ashley men were caught in a vulnerable position, and 12 were killed. Ashley and the rest of the surviving party traveled by boat downriver, ultimately enlisting aid from Colonel Henry Leavenworth, Commander of Fort Atkinson. In August, Leavenworth sent a force of 250 military men, 80 Ashley-Henry men, 60 men of the Missouri Fur Company, and a number of Lakota Sioux warriors, enemies of the Arikara. They intended to subdue and punish the Arikara. After a botched campaign, Leavenworth negotiated a peace treaty. Either David Jackson or his brother George had been appointed commander of one of the two squads of the Ashley-Henry men in this military expedition. Smith, Jackson & Sublette Little is known about Jackson's movements until just after the 1826 Rocky Mountain Rendezvous, a major gathering of trappers and traders. It is presumed he was at the first, 1825 rendezvous held on Henrys Fork of the Green River, but he may not have been at the one held in 1826 at Bear River in Cache Valley. Soon after the rendezvous, Ashley, along with his party taking back the furs, traveled with Smith and William Sublette to near present-day Georgetown, Idaho. There, Jackson and the other men bought out Ashley's share of the Ashley-Smith partnership. As a partner, Jackson took on the role of field manager, possibly because of his similar role when working for Ashley. That fall, Jackson, Sublette, and Robert Campbell trapped along the Snake River system, then moved up into the upper Missouri and over the Great Divide to the headwaters of the Columbia River.) Jackson and his party traveled south to Cache Valley, where they spent the rest of the 1826-1827 winter. He was at the 1827 rendezvous at Bear Lake, then returned to St. Louis, Missouri, which had become