Amazonas sent deputies to the Assembly of Huaura in August 1836,[1] where the Constitution of the Northern Peruvian State was drafted under the guidance of the then rebel president Luis José de Orbegoso y Moncada in the midst of the Peruvian civil war since 1835.[1] The constitution proclaimed the North-Peruvian State and the alliance with the Bolivian occupation forces for the creation of the Peru–Bolivian Confederation.[2]
With the victory of Orbegoso, the Fundamental Law of 1837 in Tacna, with approval of the self-proclaimed supreme protector Andrés de Santa Cruz, recognized Amazonas as a founding department of the Confederation.[2] Its sole representative, with the title of prefect, was Damián Nájar, who had previously acted as the governor of Maynas, as well as military commander of the same area.[3] Nájar, originally from Guayaquil,[4] was also elected deputy for Congress, alongside José Modesto Vega and Manuel Castro.[1]
Amazonas was subject to the General Government, its governor was appointed by the president of the State, and this in turn was appointed by the supreme protector on duty.[1] The governor was obliged to elect representatives of his department to participate in the Huaura assemblies, which were ordered by the president of the northern Peruvian State.[1][2] Amazonas also had deputies in the Congress of the Confederation as part of the North-Peruvian parliamentary group.[1]
The department was part of Luis José de Orbegoso's secessionist Peruvian Republic, declared in 1838.