Births on May 9

Kalifa Tillisi, Libyan historian and linguist (d. 2010)

Khalifa Mohammed Tillisi (Arabic: خليفة محمد التليسي ;9 May 1930 – 13 January 2010) was a well-known Libyan historian, translator, and linguist.

12 Mar

Salt March
Mahatma Gandhi begins the Salt March, a 200-mile march to the sea to protest the British monopoly on salt in India
6 Apr

Salt Satyagraha
Gandhi raises a lump of mud and salt and declares, "With this, I am shaking the foundations of the British Empire," beginning the Salt Satyagraha.
7 Jul

Hoover Dam
Industrialist Henry J. Kaiser begins construction of Boulder Dam (now known as Hoover Dam).
6 Sep

Hipólito Yrigoyen
Democratically elected Argentine president Hipólito Yrigoyen is deposed in a military coup.
24 Oct

Getúlio Vargas
A bloodless coup d'état in Brazil ousts Washington Luís Pereira de Sousa, the last President of the First Republic. Getúlio Vargas is then installed as "provisional president".