Carlos Loizaga was member in Paraguayan Triumvirate following death of Francisco Solano López from 1 March 1870 to 10 December 1870.
Among those who attended that meeting were: Jose Segundo Decoud, Cayo Miltos, Carlos Loizaga, Juan A. Jara and Salvador Jovellanos.
In mid-January 1869, when there is news that Asuncion was invaded by allied forces, Jovellanos returns to Paraguay, at the age of thirty-six, along with Juan B. Gill, Jose Decoud, Juan Antonio Jara, Carlos Loizaga, Benigno Ferreira, Cayo Miltos and other citizens who were considered "expatriates".
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