Brazilian President Lula da Silva sacked the army chief over the attack on government institutions by protesters supporters of former President Jair Bolsonaro earlier this month.
The official website of the Brazilian Armed Forces stated that the army commander, General Julio Cesar de Arruda, was dismissed from his position as army commander.
Arruda took office on December 30, two days before the end of Bolsonaro's term, and the da Silva administration endorsed his appointment at the beginning of this month.
Gen. Tomás Miguel Ribeiro Paiva, who was head of the Southeastern Military Command, replaced him.
Paiva said in a speech last Wednesday that the military would continue to "guarantee democracy".
"It is the people's system, and when we vote, we must respect the results of the ballot boxes," he added.
The dismissed army commander had participated last Friday in the first meeting of President Lula da Silva with the military leaders, at the conclusion of which no statement was issued.
Storming the presidential palace and Congress
More than two thousand people have been arrested since January 8, when hundreds of supporters of the former Brazilian president stormed the presidential palace, the Congress building and the Federal Supreme Court square, demanding the army to intervene to isolate President Lula da Silva.
The storming came a week after da Silva's inauguration, and Bolsonaro left the country for the United States after refusing to concede his defeat to his rival in the two-round presidential elections.
Da Silva had accused Bolsonaro of inciting his supporters to violence, and after the presidential elections that took place in Brazil amid a sharp division, there were fears that Bolsonaro's supporters would repeat the scenario of supporters of former US President Donald Trump storming the Congressional Building on January 6, 2021, in an attempt To prevent the inauguration of Joe Biden as President of the United States.