Answer: Despite its reputation for brutal warfare, the Mongol Empire briefly enabled peace, stability, trade, and protected travel under a period of “Pax Mongolica,” or Mongol peace, beginning in about 1279 and lasting until the empire's end. But Genghis Khan's death in 1227 ultimately doomed the empire he founded
Explanation:
Why was Tennessee not under occupation?:
"Because it ratified the Fourteenth Amendment, Tennessee was the only state that seceded from the Union that did not have a military governor during Reconstruction. This did not placate those unhappy with the Confederate defeat." - Wikipedia history
Which states took the longest to be re-admitted?:
1. South Carolina July 9, 1868
2. Mississippi Feb. 23, 1870
3. Florida June 25, 1868
What impact did riots in Memphis and New Orleans have on Reconstruction?:
"The riots catalyzed support for the Fourteenth Amendment, extending suffrage and full citizenship to freedmen, and the Reconstruction Act, to establish military districts for the national government to oversee areas of the South and work to change their social arrangements." - Wikipedia history