Feudalism

The fall of Roman Empire began the Medieval age. The Medieval age brought plagues, famines, diseases and in the middle of it all is Feudalism.

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References
Apecsec.org. (2015). Pros and Cons of Fuedalism | APECSEC.org. [online] Available at: http://apecsec.org/pros-and-cons-of-f... [Accessed 15 Jul. 2016].
Encyclopedia Britannica. (2016). feudalism | social system. [online] Available at: https://www.britannica.com/topic/feud... [Accessed 13 Jul. 2016].
Feudalism in the Medieval era. (2016). Positives/Negatives. [online] Available at: http://feudalisminthemedievalera.weeb... [Accessed 15 Jul. 2016].
History Learning Site. (2016). Medieval Women - History Learning Site. [online] Available at: http://www.historylearningsite.co.uk/... [Accessed 15 Jul. 2016].
Lordsandladies.org. (2016). Decline of Feudalism. [online] Available at: http://www.lordsandladies.org/decline... [Accessed 15 Jul. 2016].
Westernreservepublicmedia.org. (2016). The Middle Ages | Feudalism. [online] Available at: http://westernreservepublicmedia.org/... [Accessed 13 Jul. 2016].
Wikipedia. (2016). Feudalism. [online] Available at: https://en.wikipedia.org/wiki/Feudalism [Accessed 13 Jul. 2016].
And more that I forgot to cite :(