Chile passed a law creating the Province of Arauco to manage territory south of the Bío-Bío River and north of Valdivia. This administrative move signaled a stronger state presence along the long-standing frontier with largely autonomous Mapuche communities. It also set the stage for later military and settlement campaigns into Araucanía.
Colonel Cornelio Saavedra Rodríguez initiated a push southward by ordering an advance to the Mulchén–Bureo river confluence. A small fort was built there between late 1861 and mid-1862, helping establish a new military foothold. This marked the opening phase of a planned move of the Chilean frontier deeper into Mapuche territory.
Chilean forces founded the present-day city of Angol as a fortress and base for operations in the region. Establishing Angol provided a permanent logistical center for troops, supplies, and later settlers. It also represented a visible shift from border defense to territorial incorporation.
Saavedra left the army after political pressures from the ministers of President José Joaquín Pérez. His departure shows that the Araucanía campaign was not only a military matter but also shaped by national politics and debate over costs and strategy. Even so, the frontier project continued to develop.
During the conflict with Spain, Chile reinforced coastal defenses, including in the Araucanía coast, fearing possible Spanish raids. The government called Saavedra back in 1866 to organize coastal defense measures. This external war helped justify expanding forts and patrols in areas that also bordered Mapuche territory.
Chile occupied Queule on the Araucanía coast in a step that extended state control beyond inland forts. This action contributed to rising tension: some Mapuche groups moved toward resistance while others stayed neutral or sought accommodation. Coastal occupation also helped Chile control supply routes and communications.
As Mapuche forces prepared for wider conflict, fighting intensified and Chilean units suffered setbacks. In response, commander José Manuel Pinto adopted a scorched-earth approach in 1869, including destruction of homes and crops and seizure of livestock. These tactics weakened Mapuche food security and increased displacement, sharpening the conflict’s humanitarian impact.
Chile established the Territory (Territorio) of Angol as a special administrative unit tied to colonization policy. This change linked military control to land distribution and planned settlement, moving the project from temporary occupation toward long-term governance. It also reflected the state’s intention to integrate the region into national institutions.
The Chilean army founded Temuco as a fort during the occupation, creating a new strongpoint farther south. Its location on the Río Cautín made it a strategic hub for roads, troop movement, and later settlement. Temuco’s establishment signaled that Chile aimed to hold the territory permanently, not just raid it.
A new fortified settlement, Victoria, was founded under the command of Gregorio Urrutia. The fort helped close remaining corridors of movement between different Mapuche groups and supported deeper penetration by Chilean forces. The town later became a focal point for incoming settlers and local administration.
Chile and Argentina signed a major boundary treaty defining much of their frontier, including principles for the Andes and arrangements around the Strait of Magellan and Tierra del Fuego. By lowering the risk of conflict with Argentina, the agreement made it easier for Chile to concentrate forces and resources on internal consolidation. This mattered because Chile’s Araucanía campaign overlapped with wider regional competition over southern lands.
Mapuche leaders coordinated a large uprising in early November 1881, attacking forts and settlements across the region. While not all Mapuche factions joined, the violence showed broad opposition to new forts, towns, and land loss. Chile repelled most attacks and then intensified efforts to secure and govern the conquered areas.
In 1883, Gregorio Urrutia led operations that included establishing forts and advancing toward the Villarrica zone. These moves extended Chile’s effective control into areas that had not been firmly held by the state for centuries. The campaign’s success is commonly treated as the final phase that completed the occupation of Araucanía.
By 1883, the multi-decade occupation campaign had achieved its core goal: incorporating Araucanía into Chile’s national territory. The outcome included expansion of state administration and settlement, alongside major disruption to Mapuche autonomy and landholding. This closing point marks the shift from military conquest to long-term governance and colonization policies.
Chile reorganized the region into new provinces—Malleco in the north and Cautín in the south—building a stable administrative framework after the occupation. These provinces formalized state rule through departments and local capitals, replacing earlier colonization-territory arrangements. The change illustrates the transition from frontier war to routine government institutions in Araucanía.
Occupation of the Araucanía (Pacification of Araucanía) (1861–1883)