On March 21, 1965, Dr. Martin Luther King, Jr. led 3,200 people on the start of the third and finally successful civil rights march from Selma to Montgomery, Alabama.
Nearly two decades earlier, the Twenty-second Amendment (Amendment XXII) of the United States Constitution, passed Congress. The date was March 21, 1947. The amendment, ratified on February 27, 1951, set a term limit for election and overall time of service to the office of President of the United States. This was an obvious reaction to the more than three terms in office of Franklin Delano Roosevelt.
The first section of the amendment reads as follows:
No person shall be elected to the office of the President more than twice, and no person who has held the office of President, or acted as President, for more than two years of a term to which some other person was elected President shall be elected to the office of the President more than once. But this Article shall not apply to any person holding the office of President, when this Article was proposed by the Congress, and shall not prevent any person who may be holding the office of President, or acting as President, during the term within which this Article becomes operative from holding the office of President or acting as President during the remainder of such term.