What motivation did john chivington have to seek revenge against the indians?

John Chivington decided to seek revenge for the sake of thought that Indians were alone in camp in view of white.

Explanation:

John decided to take the severe revenge from the Indians as he had a thought that Indians has been left hostile to the wide of whites. He also had the thought that they were put into the similar tribes to the one who have murderer so many people and put them into destruction.

John Chivington have to seek revenge against the indians because he believe that the indians in the camp were hostile to the whites. Thus he also believed that they were of the same tribes with those who had murdered many persons and destroyed much valuable property on the Platte and Arkansas rivers during the previous spring, summer and was beyond a doubt.