1892    The Pledge of Allegiance is first recited.

1892    The Pledge of Allegiance is first recited by students in many US public schools, as part of a celebration marking the 400th anniversary of Columbus's voyage.

1945    The United States Congress officially recognizes the Pledge of Allegiance.

1954    U.S. President Dwight D. Eisenhower signs a bill into law that places the words "under God" into the U.S. Pledge of Allegiance.