After the end of the Revolutionary War, the British left the colonies (for the most part) and ceded control to the new American government. Americans ruled themselves instead of being... The immediate effect of the American Revolution was that the American colonies became a free and independent country.
After several weeks of civil unrest, the East German government announced on 9 November 1989 that all GDR citizens could visit West Germany and West Berlin.
The "fall of the Berlin Wall" paved the way for German reunification, which formally took place on 3 October 1990.
The authority of Congress to stretch its power beyond those specifically identified in the Constitution is known as the "Elastic clause," since the Founding Fathers knew that the Constitution would need to "adapt" to modern times.