During the period of westward expansion in the United States, there were conflicts between pioneers and Native American tribes along the Oregon Trail. These conflicts were often due to competition for resources such as land, water, and game, as well as cultural misunderstandings and differences in perspectives. Some notable conflicts include the Whitman Massacre of 1847, the Rogue River Wars, and the Snake War of 1855-56. While not all interactions between pioneers and Native Americans were hostile, these conflicts did occur and contributed to the complex history of the Oregon Trail.