One of the biggest problems faced by outsiders living in Indian Territory was lack of reservation system.
The reservation system was a disaster for the Indians as the government failed to keep its promises. The nomadic tribes were unable to follow the buffalo, and conflict among the tribes increased, rather than decreased, as the tribes competed with each other for fewer resources.
Many foreigners die from lifestyle-related diseases such as heart disease and diabetes. Infant mortality rates are significantly higher for Indians than for whites, and alcohol and drug abuse is on the rise. Many people leave the reservations for urban areas in search of employment and improved living conditions.
Therefore, reservation system is the biggest problem.
learn more about Indian reservation system from here: https://brainly.com/question/24975751