After that, European immigrants, such as Ukrainians, Poles, Germans and Italians settled with their families in the region, attracted mainly by the similar climate, topography, vegetation and opportunity of having a better quality of life.

In the early 20th century, the Contestado War, a conflict that Paraná, Santa Catarina and Argentina contested the region rich in "erva mate" and crossed by an important railway.

Due to the war, the area had been completely destroyed; so that, the existent city of União da Vitória, at the Iguazu Valley, started its renovation and development.

The city is widely known for its universities in the Southern Region of Brazil, gathering a large quantity of students from the south of Paraná and the north of Santa Catarina.

Being located between the Second and the Third Plateaus, the city's topography is characterized by extrusive igneous mountains origined in the Paraná Flood Basalt; making this region full of waterfalls and creeks nationally known.