The Chaco War 1932–35: South America’s greatest modern conflict - Alejandro de Quesada - Google Books

https://books.google.de/books?id=dTm3CwAAQBAJ&pg=PA34

The Chaco War was massive territorial war between Bolivia and Paraguay, which cost almost a 100,000 lives. An old fashioned territorial dispute, the contested area was the Gran Chaco Boreal, a 100,000-square mile region of swamp, jungle and pampas with…