La Libertad 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 La Libertad as a founding department of the Confederation.

[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] La Libertad also had deputies in the Congress of the Confederation as part of the North-Peruvian parliamentary group, represented by Pablo Diéguez [es], Pedro Delgado y Cotera, Manuel de Espino, Miguel Tinoco, José de Lamas and Juan Antonio de Torres.