<span>Feudalism developed in Western Europe at around 800 C.E. from the remnants of the Western Roman Empire. As a result of central authority being unable to perform its functions and prevent the rise of local powers, this decentralized organization formed. It is believed by some historians that the system was first initiated in France by the Normans from the time they first settled there. Many remarkable things were still accomplished during this era. For example, Monk Missionaries converted the Europeans and united Europe into Christendom, giving the region a common religion. This allowed for the Pope to become a political power. Also, Charlemagne introduced the importance of education. This is significant because it provided Europe with a common language: Latin. Together, these two things began to re-civilize Europe. -Ap world history101</span>
The primary events that led to the United States declaration of war against Germany were the Zimmerman Telegram and Germany's announced intention to resume unrestricted submarine warfare. American sentiment had leaned toward the Allies and against the Central powers for some time.