As Spain lost control of its colonial possessions, from the ashes of their old Viceroyalty of the Rio De La Plata the nations we now know as Argentina, Paraguay, and Uruguay slowly formed. In a small civil conflict between two political parties in the smallest country in the region, Uruguay, the greatest war in South American history was sparked. The War of the Triple Alliance or as it is also often called the Paraguayan war culminated at the battle of Tuyuti fought in 1866. This battle is widely considered the Waterloo of South America.