What kind of problems did the Sioux Indians have?

there are many problems they faced but i'll just name the basics. First they had harsh weather such as tornadoes sense they were in tornado alley and also cold winters that usually lead to death. Other problems they took on were; wars over boundaries, starvation from lack of crops which is relavant to weather causing that to happen and excacution due to the chiefs orders. There are more but as I said i would just name the basics. I hope this was useful to you if not i am dearly sorry. thanks byie