The colonists arrived ill-prepared to become self-sufficient. They had planned on trading with the Native Americans for food, were dependent upon periodic supplies from England, and had planned to spend some of their time seeking gold. Leaving the "Discovery" behind for their use, Captain Newport returned to England with the "Susan Constant" and the "Godspeed", and came back twice during 1608 with the First Supply and Second Supply missions. Trading and relations with the Native Americans was tenuous at best, and many of the colonists died from disease, starvation, and conflicts with the natives. After several failed leaders, Captain John Smith took charge of the settlement, and many credit him with sustaining the colony during its first years, as he had some success in trading for food and leading the discouraged colonists.