During the 1920s and 1930s, several key events and developments occurred across South America:
- In Venezuela, large oil discoveries in the 1920s transformed the country's economy and made it one of the world's largest oil exporters.
- Argentina experienced political instability and violence from anarchist movements in the early 1920s.
- Brazil remained under an oligarchic regime that prevented many from voting but faced numerous rebellions between 1893-1926.
- Chile transitioned between parliamentary and presidential systems of government amidst political turmoil in the mid-1920s.
- Ecuador developed its infrastructure and economy under the liberal leadership of Eloy Alfaro in the early 1900s.