There are many theories for the cause of the United States the USS Maine explosion with Us men aboard where many died. According to the United States Naval Investigative team team their research concerning this incident , they came to a conclusion that the explosion was caused by fire that had ignited the ammunition stock. According to these investigators there was a strong evidence that the explosion of Maine was caused by an internal coal fire which ignited the magazines. This was a likely cause of the explosion, rather than the initial hypothesis of a mine
From what I know, the Mongols we're known for not making huge changes in the lives of their subjects. This is what allowed the Mongolian empire to grow so large. I hope this helps