The Dorian invasion is a concept devised by historians of Ancient Greece to explain the replacement of pre-classical dialects and traditions in southern Greece by the ones that prevailed in Classical Greece. The latter were named Dorian by the ancient Greek writers, after the Dorians, the historical population that spoke them.
Answer:
Trains
Explanation:
The expansion of the railroad system allowed goods and people to move around faster than ever before
It allowed Missouri to be a slave state.
