Salvador Allende takes office as President of Chile, the first Marxist to become president of a Latin American country through open elections.

Salvador Guillermo Allende Gossens was a Chilean socialist politician who served as the 28th president of Chile from 1970 until his death in 1973. As a socialist committed to democracy, he has been described as the first Marxist to be elected president in a liberal democracy in Latin America.

The president of Chile, officially the president of the Republic of Chile, is the head of state and head of government of the Republic of Chile. The president is responsible for both government administration and state administration. Although its role and significance have changed over time, and its position and relations with other actors in the national political organization have also evolved, it remains one of the most prominent political offices in the country. It is also considered one of the key institutions that form the "Historic Constitution of Chile," and is crucial to the country's political stability.

Marxism is a political philosophy and method of socioeconomic analysis that uses a dialectical materialist interpretation of historical development, known as historical materialism, to understand class relations and social conflict. Originating in the works of 19th-century German philosophers Karl Marx and Friedrich Engels, the Marxist approach views class struggle as the central driving force of historical change.

Latin America is the cultural region of the Americas where Romance languages are predominantly spoken, primarily Spanish and Portuguese. Latin America is defined according to cultural identity, not geography, and as such it includes countries in both North and South America. Most countries south of the United States tend to be included: Mexico and the countries of Central America, South America and the Caribbean. Commonly, it refers to Hispanic America plus Brazil. Related terms are the narrower Hispanic America, which exclusively refers to Spanish-speaking nations, and the broader Ibero-America, which includes all Iberic countries in the Americas and occasionally European countries like Spain, Portugal and Andorra. Despite being in the same geographical region, English- and Dutch-speaking countries and territories are excluded.