They dropped alligator carcasses on the bottom of the ocean floor as an experiment on a better understanding of the underwater food system! :) and this happened in 2020 Jan 11th
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They built new paved roads so that a greater number of dump trucks could remove the excavated earth. They sprayed insecticides to kill mosquitoes and built concrete locks to raise ships to a higher elevation.
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The best description would be that they were regularly attacked by the arabs eventually leading to the fall of the Byzantines and there empire and lead to the citys rename to istanbul which is still there in modern day middle east. It is The empire was regularly attacked by Arab Muslims. I hope this helped.
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It gave Congress the power to declare war, but individual states could decide whether or not to provide soldiers.