Hvem førte en ekspedition til kanten af oklahoma, hvor han blev vendt tilbage af spanske soldater?
Zebulon Pike
Red River Expedition (1806)
(Jefferson bestilte Pike-ekspeditionen gennem Wilkinson, som også skulle finde Red Rivers udspring og udforske den vestlige del af Louisiana-territoriet langs Arkansas-floden. Ekspeditionen, der tog af sted fra St. Louis i juli 1806, registrerede i november opdagelsen af det, der blev kaldt Pikes Peak i det nuværende Colorado.  En stor del af gruppen, der blev ledet af kaptajn Zebulon Pike, Jr. blev i februar 1807 taget til fange af spanierne efter at have begået fejl i navigationen og blev tvunget til at overvintre i New Mexico. Spanien protesterede officielt over for USA over den militære ekspedition inden for dets territorium, men da nationerne ikke var i krig, eskorterede Spaniens tropper Pike og de fleste af hans mænd til grænsen til Louisiana og løslod dem senere samme år).
Zebulon Pike
Red River Expedition (1806)
(Jefferson commissioned the Pike expedition through Wilkinson, which was also to seek the headwaters of the Red River, as well as exploring the West of the Louisiana Territory along the Arkansas River. Departing from St. Louis in July 1806, the expedition recorded the discovery in November of what became called Pikes Peak in present-day Colorado.  Much of the party, led by Captain Zebulon Pike, Jr., were captured in February 1807 by the Spanish after having made mistakes in navigation and being forced to winter in New Mexico. Spain protested officially to the US about the military expedition within its territory but, as the nations were not at war, its troops  escorted Pike and most of his men to the Louisiana border and released them later that year.)
Red River Expedition (1806)