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Chaco War

War between Bolivia and Paraguay

EventwarQ223126

Started: September 9, 1932
Ended: June 12, 1935
Location: Gran Chaco
Country: Bolivia
Participant: Bolivia
, Paraguay

Overview

From Wikipedia, the free encyclopedia · Read full article · Text CC BY-SA 4.0

The Chaco War was fought from 1932 to 1935. It was between Bolivia and Paraguay over control of the northern part of the Gran Chaco region, which was thought to be rich in petroleum. The war is also referred to as La Guerra de la Sed, since it was fought in the semi-arid Chaco. It was the first that took place in South America in which modern weapons were used, and also the bloodiest South America war of the 20th century — around 2% of the Bolivian population and 3% of Paraguayans were killed during the conflict.

Overview

All data

32 statements · 13% with external sources · numbers in brackets are citations

Part of: interwar period
Members / parts: First Battle of Alihuatá

On other databases

23 identifiers linking Chaco War across the web's reference databases

-21.3272, -59.7367OpenStreetMap ↗

Data quality

statements

13%

externally sourced

Source last edited August 9, 2026. AIDb refreshes this page daily.

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AIDb. (2026). Chaco War (Q223126). Retrieved from https://aidb.si/e/chaco-war-Q223126