In 1525, Europeans entered Paraguay for the first time, followed by the Spanish colonial period. The Asuncion domain was established in 1537. In the 17th and 18th centuries, Jesuit missionaries established Catholic Indian naturalization zones in Paraguay. During the Spanish colonial rule, the Paraguayan people never gave up the struggle, and the uprising continued.
At the beginning of the 19th century, when the revolutionary movement throughout Latin America flourished, the people of Paraguay, like other neighboring areas, were also brewing an independence movement against Spanish colonial rule. In May 1810, after the white people of Buenos Aires declared their independence, they asked the provinces of the Governor-General of La Barata to join, but the people of Paraguay refused.
In order to force the Paraguayan people to accept this request, the Buenos Aires government sent Belgrano to lead an army to Paraguay, but this army was defeated by the Paraguayan people in January 1811. In May 1811, the people of Paraguay discovered that the governor Velasco was connected with the royal party, so they decided to launch an uprising. On May 14, the insurgents in Asuncion expelled the governor Velasco from the country. In June, the parliament officially announced its separation from Spanish rule and the establishment of an independent Republic of Paraguay.
The Constitution was passed in October 1813. In May 1814, Francia became the dictator of Paraguay.