The May 14 Revolt takes place in Lisbon, Portugal.

The May 14 Revolt (1915) was a politico-military uprising led by Álvaro de Castro and General Sá Cardoso which started in Lisbon, Portugal, with the objective of taking power from the dictatorship of General Pimenta de Castro during the Portuguese First Republic and returning the government to the principles of the 1911 Constitution.

Lisbon is the capital and largest city of Portugal, with an estimated population of 575,739, as of 2024, within its administrative limits and 3,028,000 within the metropolis, as of 2025. Lisbon is mainland Europe's westernmost capital city, and the only one along the Atlantic coast, the others being on islands. The city lies in the western portion of the Iberian Peninsula, on the northern shore of the River Tagus. The western portion of its metro area, the Portuguese Riviera, hosts the westernmost point of Continental Europe, culminating at Cabo da Roca.

May 14 is the 134th day of the year in the Gregorian calendar; 231 days remain until the end of the year.