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Traveling through river systems was a common mode of transportation before modern era when railroads and highways were not available.
19:52 - 34:57 (15:05)
Summary
Traveling through river systems was a common mode of transportation before modern era when railroads and highways were not available. River networks were the quickest ways of traveling. Petty kingdoms and warlords had control in areas like Norway, trading at low levels and sometimes extending to higher levels.