The first one is the answer ;)
Answer:
The Red River and the Arkansas River
Explanation:
These two, and their many tributaries, flow into Oklahoma from all six of the state's neighbors.
Answer:
The change in breastplates and helmets contribute to decline of the Roman Empire by weakening the the military. It weaken them because the removal of it promote laziness and negligence of training and the such. It also removes the protection against ranged weapons which caused many casualties.
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