February 1955. The PLA seized the Yijiangshan Islands on 18 January 1955. Fighting continued in nearby islands off the coast of Zhejiang, as well as around Kinmen and the Matsu Islands in Fujian. On 29 January 1955, the Formosa Resolution was approved by both houses of the U.S. Congress authorizing Eisenhower to use U.S. forces to defend the ROC and its possessions in the Taiwan Strait against armed attack. The U.S. Navy then assisted the Nationalists in evacuating their forces from the Tachen Islands. In February, British Prime Minister Winston Churchill warned the U.S. against using nuclear weapons, but in March, U.S. Secretary of State John Foster Dulles stated publicly that the U.S. was seriously considering a nuclear strike. In response, the NATO foreign ministers warned at a meeting of the alliance against such action. In late March, U.S. Admiral Robert B. Carney said that Eisenhower is planning "to destroy Red China's military potential." At the April 1955 Bandung Conference, China articulated its Five Principles of Peaceful Coexistence and Premier Zhou Enlai publicly stated, "[T]he Chinese people do not want to have a war with the United States. The Chinese government is willing to sit down to discuss the question of relaxing tension in the Far East, and especially the question of relaxing tension in the Taiwan area." The crisis de-escalated, and the United States and China began ambassadorial-level discussions in Geneva on August 1, 1955. Two years of negotiations with the United States followed, and covered many issues, although no agreement was reached on the primary issue, Taiwan. Aftermath Some scholars hypothesized the PRC backed down in the face of American nuclear brinksmanship and in light of the lack of willingness by the Soviet Union to threaten nuclear retaliation for an attack on the PRC. Others see the case as an example of effective application of extended deterrence by the United States. On 1 May the PLA temporarily ceased shelling Kinmen and Matsu. The fundamental issues of the conflict remained unresolved, however, and both sides subsequently built up their military forces on their respective sides of the Taiwan Strait leading to a new crisis three years later. There are strong indications that Mao used the crisis in order to provoke the United States into making nuclear threats, which would give him domestic support to pour money into research and production of Chinese nuclear weapons and missile technology. After American