only one person is supposed to answer this Why did the Mongol Empire last only for a relatively short time?

The Mongol empire seemed to last a short time due to the fact that they were united only for a common goal, was further destabilized by plague & revolts from conquered countries.

richard milhous nixon (january 9, 1913 – april 22, 1994) was the 37th president of the united states, serving from 1969 to 1974, when he became the only president to resign (quit). he is also known for corruption and the watergate scandal which resulted in the public losing trust in him and his resignation.