The General Command of Maynas, which had declared its independence on August 19, 1821, and had subsequently fought for to consolidate it,[4] was incorporated into the Protectorate of Peru as the department of Quijos and Maynas through a Supreme Decree issued by José Bernardo de Tagle y Portocarrero, 4th Marquess of Torre Tagle, on April 28, 1822,[1][3][5] with its capital in Moyobamba.

[1] It was the site of a pro-Royalist sublevation later on the same year, which ultimately failed as Moyobamba was again occupied by troops of the Peruvian Army headed by José Nicolás Arriola [es] on September 25.

[2] Shortly after the rebellion was suppressed, Damián Yépez was named the first governor of the territory.

[2] Despite this title, Maynas was administered with ambiguity and without a clear political demarcation due to the confusion caused by the uti possidetis agreement of 1810.

[2] In Republican Peru, the name simply referred to an area mentioned by Torre Tagle's decree that mentioned a population of 15,000 people which allegedly had produced a deputy to represent them at the first Congress of the country.