Complex sentence: Too late, scout Joe Kipp recognized the camp as belonging to Heavy Runner, who was considered peaceful and was not to be attacked per orders from Colonel Philippe Régis de Trobriand (commander of the Military District of Montana).
Split into simpler sentences: Too late, scout Joe Kipp recognized the camp as belonging to Heavy Runner. He was considered peaceful and was not to be attacked, per orders from Colonel Philippe Régis de Trobriand (commander of the Military District of Montana).