The Treaty of Paris fixed the Western boundary of the United States at the River Mississippi in? A. 1781 B. 1783 C. 1791 D. 1785 💾 Save the Page as PDF: 📥𝐃𝐨𝐰𝐧𝐥𝐨𝐚𝐝 𝐍𝐨𝐰! Related Read more articles Previous PostUnder Adams-Onis treaty United States acquired Florida from? Next PostWhich of the following state(s) Colonised USA? If the aforementioned Answer is Wrong. Leave a Reply with an authentic source.Cancel reply