Question

Why were the roads and railway network built by French in Vietnam

Answer 1

roads and railways were needed for the fast movement of army. they were. needed to transport raw materials from the interior parts of Vietnam to the port cities.
this helped to transport goods for trade, move military garrison and control entire region.
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Answer 2

roads and railways were needed for the fast movement of army. they were. needed to transport raw materials from the interior parts of Vietnam to the port cities.

this helped to transport goods for trade, move military garrison and control entire region.