In the late 1800s people in many parts of the world decided to leave their homes and immigrate to the us fleeing crop failure land and job shortages rising taxes and famine many came to the us because it was previewed as the economic opportunity so
Technically they were they were given a far chance but at the same time they had to start over completely and live off of trying to farm they were out on their own.
Answer:
Silk Road
Explanation:
Europeans were interested in trading there and buying silk as it was a luxurious item then, and they could also profit on the route.
There were lots of foreign changes that presented challenges for the US. I'll give you a few examples from different time periods. First would be when England wanted to tax the Americans in the Revolutionary period. They did this to try and restrict America's freedom. Another example would be that Russia had spies during the cold war period. This was to gain intelligence of the US war plans. Also when Germany sent the Zimmerman Telegram to Mexico during the WWII period. This was to get Mexico to launch a surprise attack on the US.