A valid conclusion about Global Empires is that Most European countries and colonies had access to water for trade.
Most European countries that became massive colonial empires, had access to the ocean which enabled them to use ships to both trade and send soldiers to colonies.
Empires with sea ports in their home countries include:
The above were the main European empires at the time and they all had access to the water. We can therefore conclude that you be a major European power with colonies, you needed access to water.
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