Chaco War

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Chronology

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1. Bolivian occupation of territory in Chaco

Was a Bolivian military offensive to invade the disputed region of Gran Chaco at the beginning of the Chaco War.

• June 1932: A Paraguayan detachment drove the Bolivian troops from the area of Fortín Carlos Antonio López at Pitiantutá Lake.
• July 1932: The outpost (fortín) of Boquerón, among others, had been occupied by Bolivian troops since late July 1932 following instructions of president Daniel Salamanca, which led to the escalation of what began as a border conflict into a full-scale war.
• June 1932: A Bolivian detachment captured and burned to the ground the Fortín Carlos Antonio López at Pitiantutá Lake.

2. First Paraguayan Offensive

Was a Paraguayan offensive against Bolivia during the Chaco War.

• September 1932: Battle of Boquerón (1932).

3. Bolivian offensive (Chaco War)

Was a Bolivian offensive against Paraguay during the Chaco War.

• January 1933: First Battle of Nanawa.
• April 1933: Battle of Campo Jordán.
• February 1933: First Battle of Nanawa.

4. Second Paraguayan offensive

Was a Paraguayan offensive against Bolivia during the Chaco War.

• December 1933: Bolivian troops had to evacuate Fortín Alihuatá.

5. Third Paraguayan offensive

Was a Paraguayan offensive against Bolivia during the Chaco War.

• February 1934: The Magariños-La China line was carefully built and considered to be one of the finest defensive lines of the Chaco War. However, a small Paraguayan attack on February 11, 1934, managed to breach the line, to the surprise of the Paraguayan command, forcing the abandonment of the whole defensive line.
• June 1934: Battle of Cañada Strongest.
• December 1934: In November 1934 Paraguayan forces once again managed to surround and neutralize two Bolivian divisions at El Carmen.
• June 1935: A Bolivian regiment was defeated and forced to surrender at Ingavi.
• May 1934: Battle of Cañada Strongest.
• April 1935: On 15 April the Paraguayans punched through the Bolivian lines on the Parapetí River, taking over the city of Charagua.
• November 1934: The 12,000-man-strong Bolivian Cavalry Corps managed to capture Yrendagüé.

6. Peace of Buenos Aires

Was a treaty signed on July 21 , 1938 in Buenos Aires, that ended the Chaco War, granting Paraguay the sovereignty of about 75% of the Gran Chaco area in dispute, and giving Bolivia the rest.

• July 1938: The Treaty of Peace, Friendship and Limits, signed in Buenos Aires, ended the Chaco war, granting Paraguay the sovereignty of about 75% of the Chaco region in dispute, and giving Bolivia the rest.