The Paulistas' raids extended as far as the Jesuit villages in Paraguay and those on the Upper Uruguay, but here the priests managed to hold their own. Portugal's next move toward getting possession of all the territory east of the Parana and the Uruguay was made from the coast. In 1680, an expedition sent by the governor of Rio landed directly opposite the city of Buenos Aires and built a fort--calling it Colonia. This was the first permanent occupation of Uruguayan soil, either by Portugal or Spain. Both nations claimed it under differing interpretations of the Treaty of Tordesillas. Portuguese historians claim that the Paulistas had explored and asserted a right to the region in the early years of the seventeenth century; and Spanish authorities state that Jesuits had established a mission on the Lower Uruguay about the same time. As a matter of fact, Colonia was the first permanent European settlement south of Santa Catharina and north of the Plate, on or near the Atlantic coast. The governor of Buenos Aires promptly raised a force, sailed across the estuary, and captured the new fort. However, Spain's diplomatic position in Europe at the time did not justify risking serious trouble over a matter that seemed so trifling as the possession of a piece of desert in South America. The governor was ordered to restore Colonia to the Portuguese authorities, leaving open for subsequent discussion and determination the question as to which nation was entitled to the territory on the north bank. With some interruptions, Portugal remained in possession of the port of Colonia for a century, and its existence was a constant source of annoyance to the Buenos Aireans. It immediately became a rival for the trade with the interior, and its merchants had the advantage of the open aid of their own government. Their competitors at Buenos Aires across the river were confessedly engaged in breaking the law of their country. Exportable goods were never safe from seizure until they had left Argentine soil. Colonia was a convenient storing-place, and the river crafts, once within its port, could discharge at their leisure, free from anxiety that active officials might threaten to enforce inconvenient laws. Every time a war broke out between the two countries in Europe, the exasperated governor of Buenos Aires would send over an expedition and capture the Portuguese town. Three times was it taken and as often restored on the conclusion of peace. Colonia in Portuguese hands interfered with the trade of Buenos Aires merchants, and the illicit gains of Spanish officials, and also destroyed any remnant of efficiency remaining to the prohibition of commerce across the Atlantic. Back of these commercial and temporary considerations was the menace to the future occupancy by Spaniards of the vast and fertile region extending from the boundaries of Sao Paulo to the mouth of the Uruguay. CHAPTER IV THE EIGHTEENTH CENTURY