Editing Valparaíso (section)

===20th century===
[[File:Titulares con que El Mercurio de Valparaíso informaba, el 14 de mayo de 1903, de lo ocurrido dos días antes..jpg|thumbnail|Headlines of {{Lang|es|[[El Mercurio de Valparaíso]]}} on 14 May 1903; in English, it reads:
{{quote|The Strike of the Seafarers. Fire of the South American Company. Assault on the printing press of ''El Mercurio''. Fire of the Malecon. Attitude of the Authority. The troops arrived from Santiago. The calm is restored. Meetings in the Municipality. It reaches an Arrangement. The Court of Appeals. The city in State of Siege.}} ''El Mercurio, 1903'']]
The twentieth century began with the first big protest of dockworkers, Chile on 15 April 1903, due to complaints by dockers about their excessive working hours and demands for higher wages, requests that were ignored by employers, creating a tense situation that led to serious violence on 12 May. There were protests and the burning of the [[CSAV]] offices and several people were shot and killed. All this prompted intervention by the state. This protest was important for the future of Trade Unionism in the country.
That same year, electric trams were introduced.

The [[1906 Valparaíso earthquake]] caused severe damage throughout the city on 16 August, which was at that time the heart of the Chilean economy. The damage was valued at hundreds of millions of pesos of the time, and human victims were counted at 3,000 dead and over 20,000 injured. After the removal of the debris, reconstruction work began which included the widening of streets, culverting and covering streams, (Jaime and Delicias–and creating the avenues Francia and Argentina respectively). The main street of the city (Pedro Montt) was laid and Plaza O'Higgins was created; a hill was removed to allow the passage of Colon Street. The damaged Edwards mansion was demolished and in its place, the present Cathedral of Valparaíso was built and, among many other works it gave shape to the Almendral Valparaíso area.

In 1910, the port expansion work of the city began and ended in 1930. A long breakwater was built, along with piers and docking terminals. The Imperial German East Asia Squadron engaged the British West Indies Squadron on 1 November 1914 at the [[Battle of Coronel]] off the coast of Valparaiso, sinking two British cruisers. After the battle the East Asia Squadron stayed in Valparaiso Harbor before continuing to the Falklands.