submarine warfare.
Explanation:
As germany took down a civilian ship having more than 3000 passenger in medeterian sea..
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The main benefit of slavery to governments in the colonies is that it provided a system of almost entirely free labor, since the slaves were not compensated for their work, which took place primarily in fields. <span />
Answer:
D
Persians didn't have cannons
Arrows would have been blocked with the shields
cavalry would have been blocked by a shield formation