Perhaps the most historic campaign in which the Wabash route played a part was Hamilton's journey across it in 1778 when he went to the recapture of Vincennes.[71] From the standpoint of this present study this campaign is of particular interest, as it was one of the exceedingly few instances in which a military movement was made by water on the lesser rivers of the West. It is remarkable that though the two important posts west of the Alleghenies, Detroit and Pittsburg, were through many years, in the possession of bitter enemies, neither one ever conquered or hardly attempted to conquer the other. A hundred plans for the capture of Detroit were conceived in Fort Pitt, and many a commander of Fort Detroit was determined to subdue Fort Pitt.[72] Yet it can almost be said that nothing of the kind was ever actually attempted, unless McIntosh's campaign be considered such an attempt. This was because the journey between them could be accomplished only by a long, tedious land march over the Great Trail,[73] or by a desperate journey over small inland streams and the portages between them. Difficult as the land journey over the Indian trail would seem, it is clear that it was considered preferable to any water route in Revolutionary days.[74]
Thus Hamilton's campaign over the Wabash route upon Vincennes was an exceptional feat, successfully accomplished after great hardships and delays. Clark's marvelously intrepid recapture of this fort by wading through the drowned lands of the Wabash has so far eclipsed all other events of that campaign that the heroism of other actors has been forgotten.
On October 28, 1778,[75] Hamilton left the Miamis' town, where he held conferences with the Indians, and proceeded to Pied-froid, on the other side of the river St. Joseph.
The day following the gun-boat was placed on the carriage with great difficulty. Two officers were left to forward the boats from the portage, and Hamilton walked to the further end of the carrying place, three leagues, where the provisions were collected. He ordered two officers with the six-pounder and ammunition to go down to carry in pirogues. "This carry is one of the sources of the Wabash," Hamilton wrote in his _Journal_, "and takes its rise on the level plain, which is a height of land near the Miamis town. The carry is called 'petite rivière.'[76] Where the pirogues were first launched, it is only wide enough for one boat, and is much embarrassed with logs and stumps. About four miles below is a beaver dam,[77] and to these animals the traders are indebted for the conveniency of bringing their peltry by water from the Indian posts on the waters of the Ouabache.[78] On my return met Lieut. Du Vernet with seven pirogues loaded. Ordered him to proceed and join Lieut. St. Cosme, who was below the dam with some men employed to clear the chemin couvert, the narrow part of the carry, so narrow and embarrassed with logs under water and boughs overhead that it required a great deal of work to make it passable for our small craft."