On October 16, 1567, an expedition led by Spanish explorer Juan Pardo arrived at a village known as Satapo while en route to Coosa, a powerful chiefdom centered in modern northern Georgia. Research conducted by anthropologist Charles Hudson in the 1980s suggests that Satapo was situated at the Citico site in Monroe County, and that the two names are linguistically related. According to Hudson, the Pardo expedition left Olamico (on Zimmerman's Island, now submerged by Douglas Lake) on October 13 and traveled southwest across the foothills of the Great Smokies, crossing Little River at modern-day Walland and traversing Happy Valley to arrive at Chalahume (Chilhowee) in the Little Tennessee Valley on October 15. After the expedition made its way to Satapo the following day, a friendly native warned Pardo of a plot against him, and the expedition returned to Olamico shortly thereafter.