The answer is: The new lands were now thought to be a “New World”
On October 14, 1962, a spy plane flying over Cuba and found Nuclear missile sites under construction. 8 days later Kennedy sent a Naval Blockade . On October 28 Soviet announced that they were removing the missiles.
The answer is the An Lushan Rebellion. The rebellion cost the lives of hundreds of thousands. Although the Tang won the rebellion cost them their central government and the military as well as the economy.