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 looked to new sources of trade, including Spain's colonies in South America, but could not do so because the colonies were restricted to trade only with Spain. To achieve this economic objective, Britain initially tried to invade Rio de la Plata and capture key cities in Spanish America. When that failed, they chose to promote the Spanish-American aspirations of emancipation from Spain. The mutiny of Aranjuez in 1808 led King Charles IV of Spain to abdicate in favor of his son, Ferdinand VII. Charles IV requested that Napoleon restore him to the throne; instead, Napoleon crowned his own brother, Joseph Bonaparte, as the new Spanish King. These events are known as the Abdications of Bayonne. Joseph's coronation was met with severe resistance in Spain, which started the Peninsular War, and the Supreme Central Junta took power in the name of the absent king. This also led to Spain switching alliances from France to Britain. France eventually invaded Sevilla, and a Council of Regency based in Cadiz replaced the disbanded Supreme Central Junta. National causes Spain forbade its American colonies to trade with other nations or foreign colonies, and imposed itself as the only buyer and vendor for their international trade. This situation damaged the viceroyalty, as Spain's economy was not powerful enough to produce the huge supply of goods that the numerous colonies would need. This caused economic shortages and recession. The Spanish trade