What effect did king Leopold the second of Belgium have on European colonization of the Congo river basin?

King Leopold II of Belgium played a pivotal role in the colonization of the Congo River basin by establishing the Congo Free State as his personal possession in 1885. His brutal exploitation of the region for rubber and ivory led to severe human rights abuses, including forced labor and violence against the local population. This exploitation drew international attention and criticism, eventually leading to reforms in colonial policies, but it also set a precedent for European Imperialism in Africa, influencing subsequent colonization efforts. Leopold's actions exemplified the darker aspects of European colonial ambitions during the Scramble for Africa.