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The post-Napoleonic reorganization into the German Confederation in 1815 brought about a notable change with only 39 states, simplifying taxation and customs processes that previously encumbered trade. The establishment of the Prussian Customs Union reduced the trade barriers further, fostering internal trade and encouraging the growth of industries like iron and steel.
New infrastructure, such as canals and railways, aided in this expansion, bolstering inter-state commerce and contributing to economic recovery.