Argentine War of Independence Chile, allied with the Mapuches. On April 4, Argentine Colonel Juan Gregorio de Las Heras had occupied Concepción, but the Royalists retreated to Talcahuano. In early 1818, Royalist reinforcements from the Viceroyalty of Peru arrived, commanded by general Mariano Osorio, and advanced towards the capital. San Martín then turned to scorched earth tactics and ordered the evacuation of Concepción, which he thought was impossible to defend. On 18 February 1818, the first anniversary of the battle of Chacabuco, Chile declared its independence from the Spanish Crown. On March 18, 1818, Osorio led a surprise attack on the joint Argentine-Chilean army,
On the Restoration of Independence of the Republic of Latvia the Republic of Latvia "de jure" is a sovereign country. It observes that the Republic of Latvia proclaimed independence on 18 November 1918, and was internationally recognized in 1920, and that Latvia was admitted to membership in the League of Nations in 1921. The first country to recognize the independence of Latvia "de jure" was Soviet Russia on 11 August 1920, when the Soviet-Latvian Peace treaty was signed (it is generally considered that the independence of Latvia "de jure" was internationally recognized on 26 January 1921, when it was recognized by the Allies of World War I). The declaration notes