There is many reason, one way they could've been worried about is if the
new settlers would make war or take their land and food.
Another way is that they could've cause the Mexican to come of their land.
Hope it helped
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What aspects of Roman government do we still use in our society today?
What styles of Roman architecture and art inspired the European Renaissance?
Was Julius Caesar a Roman hero or villain?
Was it right for Rome to become an empire rather than a republic?
What advancements did the Romans make in science and mathematics?
What advancements did the Romans make in warfare?
How to the Romans compare to the ancient Greeks?
The Atlantic Ocean. Its the ocean that connects North and South America to Europe. Most early explorers came from Europe and "discovered" the Americas. The slave trade as well as spice trade used the Atlantic ocean because it's the most direct way from most of Europe.
