From Wisconsin History (Wisconsin Historical Society)
At this time at Prairie du Chien the events of the war of 1812 in that quarter were fresh in the minds of everyone. I learned that in the spring or summer of 1814 the U.S. government sent boats made bullet proof under a Captain [Frederick] Yeiser, who was in command of the boats, and a company of U.S. troops under Lieut. [Joseph] Perkins to take and retain possession of Prairie du Chien.
Michael Chapu...private in Captain Frederick Yeiser's company of volunteers..wounded 21 July 1814 on board the gunboat Governor Clark in an engagement with the Indians at...Rock River.....