The Formosa Resolution of 1955 was a joint resolution passed by the U.S. Senate and signed by U.S. President Dwight D. Eisenhower on January 29, 1955, to counteract the threat of an invasion of Taiwan by the People's Republic of China (PRC). The resolution gave the U.S. president the authority "to employ the Armed Forces of the United States as he deems necessary for the specific purpose of securing and protecting Formosa and the Pescadores against armed attack [by the Communists]".

Dwight David Eisenhower, nicknamed Ike, was an American military officer and statesman who served as the 34th president of the United States from 1953 to 1961. During World War II, he was Supreme Commander of the Allied Expeditionary Force in Europe and achieved the five-star rank as General of the Army. Eisenhower planned and supervised two of the most consequential military campaigns of World War II: Operation Torch in the North Africa campaign in 1942–1943 and the invasion of Normandy in 1944.