 Both these pueblos and missions were on the California side of the Colorado River but were administered by the Arizona authorities.On July 17–18, 1781 the Yuma (Quechan) Indians, in a dispute with the Spanish, destroyed both missions and pueblos—killing 103 soldiers, colonists, and Friars and capturing about 80 prisoners, mostly women and children.In four well-supported punitive expeditions in 1782 and 1783 against the Quechans, the Spanish managed to gather their dead and ransom nearly all the prisoners, but failed to re-open the Anza Trail.