When was Christopher Columbus Arrival? what did he do when he arrived?

What was new about the writing system developed by the phoenicians, and why was this important to the growth of knowledge and spread of ideas?

Did the spanish settlers and missions have a positive effect on world history? why, what did they do that was positive? why was the treaty of paris (1763) good for the world/world history? did the plymouth colony have a positive effect on world history? why, what did they do that was positive?

Why did the us military stop the dakota uprising ?