Purssia took the lead to promote free trade movement in the German Confederation. By the 1818 Tariff Reform Act, Prussia removed all customs barriers on trade within her boundaries, making the country for the first time an economic and commercial unit. At the same time, she imposed a uniform tariff on goods from other states which entered her territory.
From 1819 onwards, certain little states entirely surrounded by Prussian territory allowed themselves to be absorbed into the Prussian tariff system. Other German states formed rival schemes of their own in the 1820s, but as the resources of the Prussian union was greater, they were too forced into the Prussian system.
On January 1, 1834, the Zollverein came into being. It included 18 states with a total population of 26 million people. Its constitution was elaborate. There was to be a customs-parliament, representing all the constituent states, and no changes could be made without the unanimous consent of the members. Between state and state there was to be complete free trade; the tariff was to be uniform on all the frontiers; and the net proceeds were to be divided in proportion to population. It also adopted a common system of weights and measures, and reduced the numerous currency systems to two.
More and more German states joined the Zollverein in the following years. By 1844, practically all Germany was in the Zollverein, except Austria and three other states.
Not content with internal free trade, the Zollverein attempted to negotiate commercial treaties with foreign powers. In 1831, Holland