<P> Juan Díaz de Solís arrived again to the renamed Río de la Plata, literally river of the silver, after the Incan conquest . He sought a way to transport the Potosi's silver to Europe . For a long time due to the Incan silver mines, Potosí was the most important site in Colonial Spanish America, located in the current department of Potosí in Bolivia and it was the location of the Spanish colonial mint . The first settlement in the way was the fort of Sancti Spiritu, established in 1527 next to the Paraná River . Buenos Aires was established in 1536, establishing the Governorate of the Río de la Plata . </P> <P> Africans were also conquistadors in the early Conquest campaigns in the Caribbean and Mexico . After 1521, the wealth and credit generated by the acquisition of the Mexica Empire funded auxiliary forces of black conquistadors that could number as many as five hundred . Spaniards recognized the value of these fighters . Although they usually chose to forget black contributions in written accounts of Spanish campaigns, Spaniards occasionally admitted that African men were outstanding soldiers (because so many African men became slaves by being captured on battlefields back in Africa, they already had military experience before coming to the Americas). One of the black conquistadors who fought against the Aztecs and survived the destruction of their empire was Juan Garrido . Born in Africa, Garrido lived as a young slave in Portugal before being sold to a Spaniard and acquiring his freedom fighting in the conquests of Puerto Rico, Cuba, and other islands . He fought in the Spanish--American War as a free servant or auxiliary, participating in Spanish expeditions to other parts of Mexico (including Baja California) in the 1520s and 1530s . Granted a house plot in Mexico City, he raised a family there, working at times as a guard and town crier . He claimed to have been the first person to plant wheat in Mexico . </P> <P> During the 1500s, the Spanish began to travel through and colonize North America . They were looking for gold in foreign kingdoms . By 1511 there were rumours of undiscovered lands to the northwest of Hispaniola . Juan Ponce de León equipped three ships with at least 200 men at his own expense and set out from Puerto Rico on 4 March 1513 to Florida and surrounding coastal area . Another early motive was the search for the Seven Cities of Gold, or "Cibola", rumoured to have been built by Native Americans somewhere in the desert Southwest . In 1536 Francisco de Ulloa, the first documented European to reach the Colorado River, sailed up the Gulf of California and a short distance into the river's delta . </P> <P> The Basques were fur trading, fishing cod and whaling in Terranova (Labrador and Newfoundland) in 1520, and in Iceland by at least the early 17th century . They established whaling stations at the former, mainly in Red Bay, and probably established some in the latter as well . In Terranova they hunted bowheads and right whales, while in Iceland they appear to have only hunted the latter . The Spanish fishery in Terranova declined over conflicts between Spain and other European powers during the late 16th and early 17th centuries . </P>

In the early periods of spanish colonization what was the primary goal