One of the reason of why maybe a war can be started in the 1812 is economy problems food resources, or even an disagreement.
It could be argued that nationalist rebellions in Egypt and India were similar because "<span>A.both failed initially but laid the groundwork for future independence," since they were fighting for similar causes. </span>
According to Pope Urban II, the best way to get people to unite is to give them a common enemy.
Pope Urban II pitched the Crusades as a religious duty with a side of fighting.
The Black Death was most likely spread through Western Europe by rats and their fleas.
The Black Death was the second major epidemic of its time. The first known epidemic of of the disease that also caused "The Black Death" was The Plague of Justinian.
I'm not sure but I think it's coal mining