Peninsular War: The Madrid rebels who rose up on May 2 are executed near Príncipe Pío hill.

The Peninsular War (1808–1814) was fought in the Iberian Peninsula by Portugal, Spain and the United Kingdom against the invading and occupying forces of the First French Empire during the Napoleonic Wars. In Spain, it is considered to overlap with the Spanish War of Independence.

Madrid is the capital and most populous municipality of Spain. It has almost 3.5 million inhabitants and a metropolitan area population of approximately 7 million. It is the second-largest city in the European Union (EU), second only to Berlin, Germany, and its metropolitan area is the second-largest in the EU. The municipality covers 604.3 km² (233.3 sq mi) geographical area. Madrid lies on the River Manzanares in the central part of the Iberian Peninsula at about 650 m (2,130 ft) above mean sea level. The capital city of both Spain and the surrounding autonomous community of Madrid, it is also the political, economic, and cultural centre of the country.

The Dos de Mayo or Second of May Uprising took place in Madrid, Spain, on 2–3 May 1808. The rebellion, mainly by civilians, with some isolated military action by junior officers, was against the occupation of the city by French troops, and was violently repressed by the French Imperial forces, with hundreds of public executions.

May 2 is the 122nd day of the year in the Gregorian calendar; 243 days remain until the end of the year.

The montaña del Príncipe Pío is a hill in the western part of Madrid, Spain.