[a] El Cabichuí was a very early example of a trench newspaper, born in a context where battle lines had been stagnant for more than a year during the Siege of Humaitá in the Paraguayan War.

[2] It was made via woodcut with a rustic press in López's headquarters (initially at Paso Pucú, and later at San Fernando, in today's Central Department).

[4] Directed by the foreign-educated Juan Crisóstomo Centurión, it had contributions from other intellectuals such as the priests Fidel Maíz and Geronimo Becchi.

[2][5] Despite this, its tone was mocking and heavy-handed, as it was aimed to be read by the soldiers of the army; due to this intent, it had text both in Guarani and Spanish, and sometimes even in Portuguese,[2] because some copies were snuck into the allied encampment by spies.

[6] The British engineer George Thompson, who was serving with the Paraguayan forces at the time, described the paper's jokes as "rude" and "stupid".