I need a 5-7 page essay that answers the question below: What were the causes of

I need a 5-7 page essay that answers the question below:
What were the causes of the First World War, why did the U.S. enter the war when it did? Explain the major turning points of the war, with attention given to its impact on the U.S at home. What were the long-term effects of this conflict?
In order for me to pass this assignment, TWO PRIMARY SOURCES (only from websites the end in .edu) need to be added. This essay will need to provide as much detail and specific examples to support the work. It’s also important to support the essay argument with sources and analysis and interpretation of them. Below will also some links that I would prefer for you to use as the primary sources.
https://dp.la/primary-source-sets/world-war-i-america-heads-to-war (Links to an external site.)
https://www.loc.gov/teachers/classroommaterials/primarysourcesets/world-war-i/ (Links to an external site.)
http://www.loc.gov/teachers/classroommaterials/presentationsandactivities/presentations/timeline/progress/wwone/ (Links to an external site.)
https://wwi.lib.byu.edu/index.php/Main_Page (Links to an external site.)
http://historymatters.gmu.edu/d/4939 (Links to an external site.)
http://historymatters.gmu.edu/d/4943 (Links to an external site.)
http://historymatters.gmu.edu/d/4970 (Links to an external site.)
http://historymatters.gmu.edu/d/4980 (Links to an external site.)
http://historymatters.gmu.edu/d/5052 (Links to an external site.)
http://historymatters.gmu.edu/d/4973 (Links to an external site.)
http://historymatters.gmu.edu/d/4962 (Links to an external site.)
http://historymatters.gmu.edu/d/453/ (Links to an external site.)
http://www.animatedatlas.com/ww1/ww1sources.html (Links to an external site.)
http://www.firstworldwar.com/source/index.htm (Links to an external site.)
http://www.gwpda.org/ (Links to an external site.)
http://wwi.lib.byu.edu/ (Links to an external site.)http://wwi.lib.byu.edu/