Railroad Building (1 giug 1840 anni – 1 feb 1860 anni)

Descrizione:

- Replaced canal building.
- Largest industry
- Gave rise to complex business organizations
- Local merchants/farmers bought stocks.
- Local/state governments helped growth by loans and tax cuts.
- Promoted Western agriculture.
- Farmers were linked with Northeast, less linked with South canals.
- Gave North advantages in Civil War

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