What do Adolf Hitler, Joseph Stalin, Mao Zedong, Benito Mussolini, Pol Pot, Kim Jong Il/Un, Saddam Hussein, Fidel Castro, Idi Amin, Hideki Tojo, Hu Jintao and Joseph Robinette Biden all have in common?
They all had to be personally protected by militaries they didn't even trust to turn not turn on them.