The 1974 Boldt Decision was a landmark ruling by U.S. District Court Judge George Hugo Boldt that affirmed the fishing rights of Native American tribes in Washington State, recognizing their entitlement to half of the harvestable fish in their usual and accustomed fishing grounds. This decision was pivotal as it reinforced the concept of treaty rights and the sovereignty of Native American tribes in relation to natural resource management, significantly impacting state and tribal relations and contributing to the broader civil rights movement.