Complex sentence: The same year gold was discovered on the recently established Yakama reservation, and conflict erupted between encroaching white miners and tribes of the Plateau, eventually united together under the leadership of Yakima chief Kamiakin, marking the start of the Yakima War.
Split into simpler sentences: The same year gold was discovered on the recently established Yakama reservation, and conflict erupted between encroaching white miners and tribes of the Plateau. The tribes eventually united together under the leadership of Yakama chief Kamiakin, marking the start of the Yakima War.