Reaction essay to ABC video "1914-1919: Shell Shock"

As you watch part two of "The Century: America's Time", which deals with World War I, prepare to write a reaction essay (approximately one page in length total, with three separate paragraphs) in class following the video in which you address the 3 topics set forth below (notes can be written on this sheet below the topics as you watch the video but write the essay either on the back of this sheet or on a separate sheet of composition paper -- be sure the essay is turned in before leaving class):

 

-- What were some of the factors that caused World War I to break out in Europe in 1914;

-- what were some of the reasons the war was so much deadlier and longer than most people thought it would be;

-- what factors influenced the United States to enter the war in 1917?