Nombre de messages : 671 Date d'inscription : 04/01/2011
Sujet: Early modern period Jeu 17 Mar - 11:00
In the 1670s, the French devised the copper pontoon; after this point, rivers and canals ceased to present significant obstacles.[7] The early modern period in pontoon use was dominated by the wars of the 18th and 19th centuries during which the art and science of pontoon bridging barely changed.
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Sujet: Early modern period 
Jeu 17 Mar - 11:00