The County unit system. See the link below that will take you to that.
"The name code talkers is strongly associated with bilingual Navajo speakers specially recruited during World War II by the US Marine Corps to serve in their standard communications units of the Pacific theater. Code talking, however, was pioneered by the Cherokee and Choctaw peoples during World War I.
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They sent and received verbally encrypted messages over radio to and from the battlefield during World War 1.
Two of the most major outcomes resulting from the Crusades were that the King's authority increased vastly and the Europeans learned new and more things from the Muslims that they had encountered and come across. Many of the peasants and farmers left their land to go fight in the wars, and wen they died, their land was handed over to the king.
