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Answer:
The Ethiopians surrounded the Italians for two weeks and, upon Empress Tayitu's advice, cut off the fort's water supply. The Italian commander agreed to surrender if they would be allowed to leave with their firearms. Menelik agreed that they could leave the garrison unharmed.
Explanation:
I believe it’s improved transportation
It started over the use of icons.The Romans wanted to use icons while the Eastern Orthodox so it as worshipping a false god. This resulted in the Roman Pope excommunicating the Emperor because he banned icons.