The National Renewal Alliance or Aliança Renovadora Nacional (ARENA) was a conservative political party that existed in Brazil between 1966 and 1979. It was the official party of the military that ruled Brazil from 1964 to 1985. In the legislative elections of 1974, MDB took many more seats than expected and almost gained a majority. The government reacted by passing legislation restricting the power of the opposition, and even succeeded in annulling the mandates of some Congressmen of the MDB.