On September 8, General Altamirano appeared in front of Congress to demand the passage of eight laws, including Alessandri's labor code.
They expressed their positions in the September 11 manifesto, which theorized a kind of "Manifest Destiny" of the Armed Forces to support the country's development.
General Altamirano proceeded to close Congress and, declaring the state of siege, assumed dictatorial powers.
The fears seemed confirmed when Ladislao Errázuriz, head of the Conservative Party and of the Unión Nacional alliance, suddenly presented his candidacy to the upcoming presidential elections.
Young military officers began to contact sectors working in favour of Arturo Alessandri's return, in particular the Comité Obrero Nacional (National Workers' Committee).
Following this new coup d'état, the power was handed to General Pedro Pablo Dartnell, who in turn gave way to the January Junta a few days later.