He was later promoted to Major and served as the personal pilot for President José Félix Estigarribia and his wife Julia Miranda Cueto, with whom he died in an air crash on September 7, 1940, at the age of 30.
In 1963, due to droughts, the Salesians moved their mission to Puerto María Auxiliadora, 30 km south of Carmelo Peralta, along the Paraguay River near Cerro Siete Cabezas, and the evangelized Ayoreo indigenous people relocated there.
[12][15] In 1974, an attempt was made to establish a Paraguayan colony named Colonia Francisco Careaga Chávez near Cerro Siete Cabezas, but ten years later, most of the lands were sold to Brazilian businesses.
The majority of the inhabitants of Carmelo Peralta engage in cattle ranching, agriculture, fishing, tourism, handicraft sales, boat trips, and trade with Brazil.
There are plans to build a modern airport outside the city in the future, featuring an asphalt runway, which will serve as the main air terminal for cargo and passenger transport in the region.