This is more of a science question, but ok. You see blue light because in the color spectrum blue passes most easily through things. Hence why the sky is blue. Its the light from the sun filtered out and only blue passing all the way through the atmosphere.
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They traveled mainly on foot and did not have the proper footwear. Runaway slaves carried little to no food, and would become weak. Injury and illness was a danger on the Underground Railroad, as well as wild animals. Despite such risks and dangers, the journeys were braved by fugitives to escape from a life Slavery. So a threat.
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Socially, you were more than likely not to see your husband for while if he didn't die in war. Economically because they were pumping money into the war wich is were rations comes up. I dont know about political.
As the Roman Empire expands it influences the civilizations that it ruled over. Romans tend to Romanize the people with the roman culture and the way of living and making a roman citizen the dream of every people inside its domain. Also the way the roman culture is propagate is through games and festivals adding more attraction to the other culture to affiliate themselves with the roman culture. Also the roman system becomes the foundation of a lot of empires and kingdoms even after the fall of the Roman Empire.
