1) We have learned that the celts are the ones traced back to the beginning of Halloween (2000 years ago).
2) The celts celebrated this day because it marked the end of summer and harvest the beginning of a dark long and cold winter, the time of year that was often associated with human death.
3) The celts believed that the ghosts of the dead returned to earth.
4) example #1 they built Huge sacred bonfires, #2 they sacrificed animals and crops to the Celtic deities, 3# they wore costumes typically consisting of animal heads and skins and attempted to tell each other's fortune.
5) The Roman Empire had conquered the majority of the Celtic territory.
6) The religion of christianity had spread into the Celtic lands where it had started to blend in with supplanted the older Celtic rites.
7) The church made it this day to honor the dead at peace.
8) It is widely believed today that the church was attempting to replace the Celtic festival of the dead with a related church-sanctioned holiday.
9) The all saints day was also called (All-hallows) and (All-hallowmas)
10) I cannot see #10 but if you would like comment it under this and I'd be glad to answer it thanks!
        
             
        
        
        
Answer:
Nationalism and imperialism encouraged each European nation to pursue its own interests and compete for power. ... The alliance system pulled one nation after another into the conflict.
Explanation:
 
        
             
        
        
        
A His capture of Vicksburg prevented shipments of Confederate supplies from reaching the West. 
William T. Sherman's siege and eventual capture of Vicksburg led to the severing of the western half of the confederate states from the east, leading to the South having problems moving supplies and man across, and effectively cut off all trade, weakening the CSA. 
B His march destroyed Georgia and demonstrated the military superiority of the Union troops. 
Sherman's famous "March to the Sea" was directed through the state Georgia, in which the soldiers destroyed many infrastructures, and burned crops. They also freed slaves in the surrounding area, which swelled their ranks.
D His capture of Atlanta facilitated the reelection of Lincoln as president.
Many Northerners were complaining that Lincoln was not doing much to help the war (as the North progressed slowly), and looked to a general that Lincoln had laid off, George McClellan, who headed the Democratic Party and promised a speedy treaty with the South with favorable terms for both sides. However, victory by Lincoln's generals meant that the people had faith in him again, and so they reelected him.
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It is NOT C, because Sherman's march to the sea was through Georgia, and in no way did it progress near the Gulf of Mexico (meaning that he cut through Texas).
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Americans were tired of war and the US should end it quickly.