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
The government created on May 25 pronounced itself loyal to the deposed King of Spain Ferdinand VII, but historians disagree on whether this was sincere or not. Since Mitre, many historians think that this professed loyalty was merely a political deception to gain autonomy. The Primera Junta did not pledge allegiance to the Council of Regency, which was still in operation, and in 1810 it still seemed unlikely that Napoleon would be defeated and Ferdinand returned to the throne (which finally happened on December 11, 1813, with the Treaty of Valençay). The purpose of such a deception would have been to gain time to strengthen the position of the patriotic cause and avoid reactions that may have led to a counter-revolution, by making it appear that monarchical authority was still respected and that no revolution had taken place. The ruse is known as the "Mask of Ferdinand VII". It was upheld by the Primera Junta, the Junta Grande and the First Triumvirate. The Assembly of Year XIII was intended to declare independence, but failed to do so because of other political conflicts between its members. However, it suppressed mention of Ferdinand VII in official documents. Before the declaration of independence of 1816, the supreme directors considered other options, such as to negotiate with Spain or become a British protectorate.