1977 Brazilian military crisis
On October 12, 1977, a military crisis was triggered by the dismissal of then Army Minister General Sílvio Frota by President Ernesto Geisel. The dismissal occurred that morning when Geisel summoned the minister for a brief meeting and informed him of his decision to remove him from office.
Source: Wikipedia — 1977 Brazilian military crisis (CC BY-SA 4.0)