What bodies of water allowed egypt to remain in contact and trade with the outside world

The Mediterranean Sea was to the north. Beyond the desert to the east was the Red Sea.

Explanation:

These waters allowed Egyptians to trade with others.

the conditions that made the byzantine empire vulnerable to attacks by the muslin turks were the sack of constantinople by western crusaders, the conquests of the sultanate of rum, presence of rival kingdoms and finally the set up of fiefdoms at the empire which were owned by the ghazis (turkish warriors).

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