Complex sentence: Also, this victory consolidated the Chilean domain over the Tarapacá Province, territory definitively annexed to Chile after the signing of the "Tratado de Ancón" (English: "Treaty of Ancon"), in 1884, which ended the war.
Split into simpler sentences: Also, this victory consolidated the Chilean domain over the Tarapacá Department. The territory was definitively annexed to Chile after the signing of the "Tratado de Ancón" (English: "Treaty of Ancon"), in 1884, which ended the war.