Sentence:  In 1819 grasshoppers again destroyed the crop at `` the Forks '' ( Fort Douglas ) and in December 1819 , twenty men left Fort Daer for the most northerly <WSD>American</WSD> outpost at Prairie du Chien . 
Meaning of the word marked with <WSD> tags:  of or relating to the United States of America or its people or language or culture