It was the war that gave birth to modern warfare, introducing machine guns, artillery, and chemical weapons. With new technology, came the need for new tactics and old generals didn't do that, which led to the meat grinder of trench warfare.
Answer:
It made city-states ununited, since they formed independently from each other. City-States were constantly fighting and going to war with each other.
Explanation:
Since city-states had distance between them, they adopted different lifestyles from one another; their economies depended on different recourses because their terrain was different from one another (ex: states by the coast would often fish as a main source of income and food). The mountanous terrain of Greece only separated city-states further and encouraged the independent growth of city-states. This meant Greece was ununited and city-states would constantly go to war with each other.
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