"The Cold War deepened and expanded during the administration of Dwight D. Eisenhower. While the superpower stalemate was maintained in Europe, the rearmament of West Germany, the Hungarian Revolution, and the status of Berlin were among the issues that aggravated Cold War tensions on that continent during the Eisenhower years. Although Eisenhower kept his promise to end the Korean War, Sino-American relations remained frigid, and, in fact, were aggravated during two crises in the Taiwan Strait. During the Eisenhower years, the United States also became more deeply involved in Indochina and took the first steps down the slippery slope to the Vietnam quagmire. The Cold War also intensified in the Middle East, as a result of Egypt's increasing dependence on the Soviet Union, and in Latin America, culminating in the establishment of the first Soviet client state in the Western Hemisphere, Cuba. During Eisenhower's presidency, the Cold War spread even to sub-Saharan Africa, when the superpowers intervened in the internal affairs of the Congo (now Zaire). The Cold War truly became global during the Eisenhower years. The friction between the United States and the Soviet Union in the Third World became increasingly dangerous as a result of a mushrooming nuclear arms race during Eisenhower's years."