Allied victory The sacking of Asunción was the occupation of the Paraguayan capital carried out as of January 1, 1869 by Brazilian forces in the Triple Alliance led by General João de Souza da Fonseca Costa.

The first places to be visited were the National Club and the residences of the President, his wife and his brothers Venancio and Benigno and Inocencia, full of fine furniture, signature paintings, carpets, Venetian mirrors, pianos and silver and gold dinnerware.

Emperor Pedro II of Brazil sent his Foreign minister José Paranhos to Asunción where he arrived on February 20, 1869 and began consultations with the local politicians.

[3] According to historian Francisco Doratioto, Paranhos, "the then-greatest Brazilian specialist on Platine affairs", had a "decisive" role in the installation of the Paraguayan provisional government.

This was followed by negotiations between the Allied countries who put aside some of more controversial points of the Treaty of the Triple Alliance and on June 11 an agreement was reached with Paraguayan opposition figures that a three-man Provisional government will be established.

The "Golden Book" offered by the "Paraguayan Ladies" to Marshal López on the anniversary of his birth, on July 24, 1867, was discovered by chance in a showcase of the National Historical Museum of Rio de Janeiro.

The archival documents also contain evidence of the colonization of Paraguay, struggles for independence, religious and indigenous issues, border demarcation, navigation problems, private correspondence between ministers of state and ambassadors, Word, eminently Paraguayan matters, such as dictates, decrees and laws of several governments, including dictator France, protest manifests against King Ferdinand VII of Spain, agreements with Argentina, Uruguay and Brazil, trade agreements, etc.