Although relations between the Spanish and the Native Americans in the earlier expeditions to the valley were initially friendly, the indigenous people began to grow accustomed to the Spanish that later came to the San Joaquin River region. As early as the 1807 Moraga expedition, it was reported that some natives were hostile and attempting to steal their horses. Indeed, when the natives began to rustle cattle and horses for food, the Spanish retaliated by burning camps and villages, and forcibly taking native children for labor at the various missions. Such conflict created enormous cultural loss, and violence continually escalated between the two sides, with no apparent end in sight.