Captain John Smith forced settelers to work in Jamestown
The correct answer is the Treaty of Versailles.
The Treaty of Versailles was the treaty that ended World War I and the war guilt clause was inserted as a punishment for the Axis forces in the war.
The images used here represent a very significant event in American history. That event was the attacks on September 11, 2001. It was important because aside from the British invasion during the war of 1812 and the Japanese attack on Pearl Harbour, there had never been an attack of such a magnitude on American soil. America thought it was safe and isolated from the problems in the rest of the world. The picture of the newspaper, with the headline "U.S. ATTACKED" would have been incredibly shocking to those who read it. The other two images of the impacts themselves and the second plane, moving towards the towers show the magnitude of the attacks.