John Charles Fremont
In the spring of 1846 John C. Fremont came through the area on his third official exploring expedition to the West and camped on the west edge of Klamath Lake during a survey mission for the government. The camp was surprised by a band of Klamath Indians who killed three of his scouts, and in reprisal the Fremont party attacked a large village or rancheria of Indians in the direction of Tule Lake. Several tribesmen were killed, the rest driven away, and their wickiups and racks of dried fish burned.
Entire story is here: Historic Resource Resource Study