Pedro Juan Caballero is a city in the Amambay department of Paraguay. It is located on the border with Brazil, specifically the state of Mato Grosso do Sul. The city is named after Pedro Juan Caballero, who was a Paraguayan military officer during the Paraguayan War. Pedro Juan Caballero is the capital of the Amambay department and is the largest city in the region. It serves as a major commercial and cultural center, and also functions as a border crossing point between Paraguay and Brazil. The city has a population of around 100,000 people and is known for its vibrant markets, historical sites, and beautiful natural scenery.