The main enemies were the United States and the Soviet Union. The Cold War got its name because both sides were afraid of fighting each other directly. In a "hot war," nuclear weapons might destroy everything. So, instead, both sides fought each other indirectly.
Access to commodities such as fabrics, spices, and gold motivated a European quest for a faster means to reach South Asia. It was this search that led the Portuguese down the coast of West Africa to Sierra Leone in 1460. Due to several technological and cultural advantages, Portugal dominated world trade for nearly 200 years, from the fifteenth to the sixteenth century. While in the fifteenth century the rest of Europe was decimated by the Black Plague, Portugal was protected by its physical isolation. Additionally, Portugal had an unusually strong national identity, due to its natural geographic borders, allowing the pooling of the considerable economic resources necessary to fund these ambitious explorations. Additionally, Portugal’s extended contact with Islam, and therefore with its superior mathematical knowledge and sailing technologies, including sail shapes, hull designs, and maritime weaponry, resulted in a Portuguese fleet capable of negotiating the high Atlantic seas.
As a consequence, most of the West African coast was explored in the period from 1415 into the 1600s. Preserved maps from this period show a remarkably accurate understanding of the complicated coastline. African exports consisted primarily of gold, ivory, and pepper. However, more than 175,000 slaves were also taken to Europe and the Americas during this period. In 1600, with the involvement of the Dutch and English, the magnitude of the slave trade grew exponentially.