South America 1935: Paraguayan Chaco Offensive
15 April 1935
15 Apr 1935
Border disputes and the Powers
1864–1878 South America at War
1878–1894 Rise of the Southern Cone
1894–1939 Border disputes and the Powers
1939–pres Pax Americana
Paraguayan Chaco Offensive
14 May 1895 Venezuela and Nicaragua Crises
14 Jul 1899 Republic of Acre
23 May 1900 Thousand Days' War
17 Jan 1903 Second Venezuela Crisis
3 Nov 1903 Panamanian Rebellion
26 Nov 1908 Rio Branco's Treaties
15 Aug 1914 Opening of the Panama Canal
19 Jul 1918 South America in the Great War
24 Mar 1922 Salomón–Lozano Treaty
24 Oct 1930 Vargas Revolution
4 Jul 1933 Chaco War
15 Apr 1935 Paraguayan Chaco Offensive
The first year of the Chaco War favored the Bolivians, but when their offensive collapsed in late 1933, Paraguay seized the initiative. By 1935, the Paraguayans had conquered most of the Chaco region. Nonetheless, both nations suffered heavily, each losing 2-3% of their population (some 100,000 over all). A treaty in 1938 confirmed Paraguay's gains, but it would not be until 2012 when commercial amounts of oil would be discovered in the territory.