on july 12, 1806, under pressure from napoleon, the union of the rhine was concluded in paris; it wass and free cities. but napoleon reworked all the small formations and gave them to larger ones, and some of them united in order to have support in the new wars against prussia, austria, russia and england brought to paris representatives of 16 german states under the threat of invasion, they were forced to sign an agreement on the union under the protection of napoleon soon into an alliance. more than two dozen german states joined, the largest baden hesson, saxony and bavaria , the roman union was more of a military alliance, its members were obliged to provide france with military help and replenish the napoleonic army with soldiers, the reitinsky union collapsed in 1813 after the defeat of napoleon's troops of the russian army and, as a result of its foreign campaign, on july 12 , 1920, us president woodrow wilson announced the opening of the panama canal. this is one of the largest and most complex hydrotechnical projects. in history. the total length of the canal is more than 81