It was due to him breaking laws, he was impeached because of high crimes and misdemeanor.
The senate must approve all treaties with a 2/3 majority.
Answer: This in turn resulted in the 1973 coup d'état and the military dictatorship of General Augusto Pinochet, whose subsequent 17-year regime was responsible for both numerous human rights violations and deep market-oriented economic reforms. In 1990, Chile finally made a peaceful transition to democracy.