True, he was impeached on February 24, 1869 for high crimes and misdemeanors
The first answer is simply the Aztec. The second question is Tenochtitlan, and floating gardens.
The peasants felt oppressed by the Tsar. They felt that it was unfair how they could not get certain jobs. They also didn't like that the most well off people in the Russian Empire were the most favored by him, while the poor were suffering.