“Man is born free, and everywhere he is in chains.”
I would say that the stirrup allowed for quicker mounting of the horse, and it may have caused horses to be used in battle more frequently.
Answer:
An alliance is a union or association formed for mutual benefit, usually between countries or other organizations. This is seen as one of the causes of WW1 because countries involved in the developing conflict brought their allies into it as well. Serbia relied on their allies such as Russia, France, and Britain, while Austria called on the Ottoman Empire and Germany.