Artigas expanded his area of influence to Mesopotamia, Santa Fe and Córdoba, and waged the Argentine Civil Wars against Buenos Aires. Portugal made a new attack to the Banda Oriental, annexed it and renamed it as Cisplatina. Buenos Aires did not help Artigas against the invasion. The remaining Artiguist forces attacked Buenos Aires in retaliation for its passivity, and defeated the city at the battle of Cepeda. The Supreme Directorship was abolished, and the country worked as a confederation of provinces. The Portuguese colony declared independence from Portugal, and became the Empire of Brazil.