It was at this time that they decided on the formation of a Revolutionary Junta to seize power. In addition to General Sá Cardoso and Álvaro de Castro, the Junta included Norton de Matos, José de Freitas Ribeiro, António Maria da Silva and they were dependent on Leote de Rego to command the Navy's revolutionary forces. The coup d'état would be similar to the 5 October revolution, supported by the Navy (the group that was most favorable to the republicans) and armed civil groups, in particular the Carbonária and Formiga Branca (especially if it seemed that the army would not support the attempt, or if it was determined that they could not be trusted).