The following units and commanders of the Brazilian and Paraguayan armies fought in the Battle of Ytororó on December 6, 1866.
Marshal of the Army Luís Alves de Lima e Silva, Duke of Caxias General Jacinto Machado Bittencourt 5th Division
Colonel Luis de Albuquerque Maranchao General Alexandre Gomes de Argolo Ferrão Filho 1st Division
Colonel Lobo d'Eça General Manuel Luís Osório 3rd Division
General José Auto da Silva Guimarães