By the beginning of June 1973, an important part of the high command of the Chilean Armed Forces had lost all respect for the Popular Unity government of President Salvador Allende, which had been in office since November 1970. During the so-called Tacnazo of 1969, high-ranking officers had learned that by exerting pressure as a group, they could achieve wide-ranging changes within the military. In 1969 they had achieved high command changes and an increase in the Armed Forces' budget. In June 1973, some began plotting against the Allende government.