Complex sentence: Feeling deceived, Old Chief Joseph condemned the United States, slashed his American flag, shred his Bible, and declined to move his band from the Wallowa Valley or to sign the treaty that would make the new reservation boundaries legitimate.
Split into simpler sentences: Feeling deceived, Old Chief Joseph condemned the United States, slashed his American flag, shred his Bible, and declined to move his band from the Wallowa Valley. Or to sign the treaty that would make the new reservation boundaries legitimate.