It helped to spread Enlightenment ideas.
Answer:
Feudalism was the social system during medieval Europe. The roles of lords was to give their loyalty ad military assistance to the king. The role of the vassals was to give homage and military service to the lords. I hope this helps:))
Explanation:
The civil war is most probably one of the best researched conflicts in world history. However, there is still a lot of space for discussion and speculation.
Answer:
C. Trench warfare
Explanation:
A's incorrect as alliances have existed for thousands of years
B's incorrect as an infantry charge's greatest weakness is the machine gun for obvious reasons
D's incorrect as both sides had machine guns, and was not the reason for victory.
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This leaves C, which makes sense as troops would be forced to hide on lower ground due to the deadliness of machine guns