THE MILITARY RÉGIME (1964-1985)
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Organic law of political parties - On July 15th, 1965, an organic law of political parties (Law No. 4740) was sanctioned. Soon afterwards, on October 27th, the Institutional Act (AI) No. 2 extinguished the political parties.

Moreover, in the same year the Complementary Act No. 4 ordered the National Congress to create organizations with attributions of political parties, which gave origin to the National Renovating Alliance (ARENA, government's supporter) and to the Brazilian Democratic Movement (MDB, the opposition).