The First Battle of the Stronghold (January 17, 1873) was the second battle in the Modoc War of 1872–1873. The battle was fought between the United States Army under Lieutenant Colonel Frank Wheaton and a band of the Native American Modoc tribe from Oregon and California, led by Captain Jack (Kintpuash in Modoc).
The US Army forces tried to dislodge the Modoc from the natural fortress, now called Captain Jack's Stronghold, in the lava beds along the south shore of Tule Lake in northeastern California. They had illegally left the Klamath Reservation in Oregon, to which they had been relocated from their territory in order to enable European Americans to settle in the area. The Modoc soundly defeated the Army, inflicting numerous casualties and forcing it to retreat.