Answer: because it was the day black people were free from slavery 
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Main Answer:The airy settlement that we explored had been built by the Anasazi, a civilization that arose as early as 1500 B.C. Their descendants are today's Pueblo Indians, such as the Hopi and the Zuni, who live in 20 communities along the Rio Grande, in New Mexico, and in northern Arizona.
Side Answers:
Which tribes of today are the descendants of the Anasazi?
The descendants of the Anasazi are still around today, though. The Pueblo and the Hopi are two Indian tribes that are thought to be descendants of the Anasazi. The term Pueblo refers to a group of Native Americans who descended from cliff-dwelling people long ago.
Who were the Anasazi and where did they live?
The Anasazi lived in the four-corners region of North America. They had three major centralized populations in three different places: Chaco Canyon (New Mexico), Mesa Verde (Colorado), and Kayenta (Arizona). They were in this region from c. 490 AD to the 1300s AD.
Where was the Anasazi tribe located?
The heart of the Anasazi region lay across the southern Colorado Plateau and the upper Rio Grande drainage. It spanned northeastern Arizona, northwestern New Mexico, southeastern Utah and southwestern Colorado—a land of forested mountain ranges, stream-dissected mesas, arid grasslands and occasional river bottoms.
 
        
             
        
        
        
Answer:
Pretty much they just settle disputes that might come about.
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Trade organizations are forums of governments to negotiate trade agreements. And if a dispute of some sort appears, the trade organizations are able to settle it by having the papers ect. Hope I helped! Have a great day! :)
 
        
                    
             
        
        
        
Answer:
While the conflict would rage across the Mediterranean world, victory in Italy was Hannibal's sole objective. To achieve it, he marched the bulk of his army in Iberia across southern Gaul (present-day France) and, famously, over the Alps into the Roman heartland. ... Romans fought wars until decisively won.
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Answer:
The answer is Vicksburg and Gettysburg on Odyssey.
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