May Revolution
The May Revolution was a direct reaction to Spain's Peninsular War. In 1808, King Ferdinand VII of Spain abdicated in favor of Napoleon, who granted the throne to his brother, Joseph Bonaparte. A Supreme Central Junta led resistance to Joseph's government and the French occupation of Spain, but eventually suffered a series of reversals that resulted in the Spanish loss of the northern half of the country. On February 1, 1810, French troops took Seville and gained control of most of Andalusia. The Supreme Junta retreated to Cadiz and dissolved itself, and the Council of Regency of Spain and the Indies replaced it. News of these events arrived in Buenos Aires on May 18, brought by British ships.
May Revolution
However, the spread of such ideas was forbidden in the Spanish territories, as was the sale of related books or their unauthorized possession. Spain instituted those bans when it declared war on France after the execution of Louis XVI and retained them after the peace treaty of 1796. News of the events of 1789 and copies of the publications of the French Revolution spread around Spain despite efforts to keep them at bay. Many enlightened criollos came into contact with liberal authors and their works during their university studies, either in Europe or at the University of Chuquisaca (modern Sucre). Books from the United States found their way into the Spanish colonies through Caracas, owing to the proximity of Venezuela to the United States and the West Indies.
The Industrial Revolution started in Britain, with the use of plateways, canals and steam power. This led to dramatic increases in the productive capabilities of Britain, and created a need for new markets to sell its products. The Napoleonic Wars with France made this a difficult task, after Napoleon imposed the Continental System, which forbade his allies and conquests to trade with Britain. Thus Britain needed to be able to trade with the Spanish colonies, but could not do so because the colonies were restricted to trade only with their parent state. To achieve their economic objectives, Britain initially tried to invade Rio de la Plata and conquer key cities in Spanish America. When that failed, they chose to promote the Spanish-American aspirations of emancipation from Spain.