Kasi and wrote numerous letters of protest to Rome and the king of Spain (then also the ruler of Portugal). As a result of these letters and protests by Portuguese merchants in Kongo and Angola, João Correia de Sousa was recalled in disgrace, and some 1,200 slaves were eventually returned from Brazil. Pedro, anxious not to alienate the Portuguese merchant community, and aware that they had generally remained loyal during the war, did as much as he could to preserve their lives and property, leading some of his detractors to call him "King of Portuguese". Birth of the Dutch Alliance Pedro also wrote to the Dutch States General proposing that the newly formed West India Company assist him in an attack on Luanda, with the BaKongo attacking by land and the Dutch by sea. Although he died before this alliance could be affected, the steady alliance between Kongo and the Netherlands would persist, eventually coming to fruition in 1641 with the Dutch attack on Luanda. References See also Kingdom of Kongo List of rulers of Kongo House of Nsundi History of Angola Manikongo of Kongo 17th-century African people Year of birth unknown Year of death missing