In 1854, the Medicine Creek Treaty between regional Native American tribes and Washington's territorial government kicked off a years-long conflict that forever changed the story of the Pacific Northwest. Sixty-eight years later, in 1922, the Sacajawea Chapter of the Daughters of the American Revolution placed a bronze plaque commemorating the momentous treaty, upon the single remaining Douglas Fir that remained at the place where the treaty was signed. It became forever known as "Treaty Tree." Today, that tree is gone, but the clues left behind may be able to point us to the exact spot where it once stood among a grove of fir trees that bore witness to a pivotal moment in the history of Washington state.