Its population has increased
Im not sure i understand what u mean....:(
Um, the achievements. They received many achievements and invented things
Mongols affected Ancient China by attacking most of China's north. In the Qin Dynasty, Qin Shi Huangdi joined up smaller walls in the north which became the Great Wall of China
Answer:
1. United States ships were getting sunk by German U-Boat warfare
2. Inability to remain neutral
3. Zimmerman Telegram of 1917
4. U.S. economic and political ties to Great Britain