History Until the arrival of the Incas the eastern plains of the Junín region, known in Quechua as "Pampas," were inhabited by the Yanesha' and the Asháninka people, who lived a hunter-gatherer lifestyle and tended to be hostile towards outsiders. Meanwhile, the southwestern Mantaro Valley was inhabited by the Huancas. Sapa Inca Pachacuti conquered this region in 1460, bringing it under the domain of the Inca Empire. Huancayo became the region's main highway rest stop on the Inca Trail. Woolen mills (known in Spanish as "obrajes" or "mills") were created during the viceroyalty, where the tissue and its craft became a tradition that continues today. On September 13, 1825, Simón Bolívar issued a decree creating what is now the Junín Region, to commemorate his victory in the Battle of Junín, the last real cavalry charge in South America where no shot was fired. Major events of national importance occurred during this period: Huancayo hosted the Assembly that issued the 1839 Constitution and on December 3, 1854, Ramón Castilla signed a decree that granted freedom to Afro-Peruvian slaves. Places of interest Asháninka Communal Reserve Chacamarca Historical Sanctuary Convent of Santa Rosa de Ocopa Gran Pajonal Nor Yauyos-Cochas Landscape Reserve Otishi National Park Pampa Hermosa Reserved Zone Sources External links Gobierno Regional Junín – Junín Regional Government official website Regions of Peru