What land did the U.S. gain in the Adams-Onis Treaty?
Categorized: Politics & Gov Source: Louisiana Secretary of State/Museums/Old State Capitol/This Month in History-February | www400.sos.louisiana.gov Description: 1819 – The US and Spain signed the Adams-Onis Treaty, which set the western boundaries of the Louisiana Purchase. The treaty established the Sabine River as the boundary between Louisiana and Texas. Answered: Feb 11 2010, 02:42pm Answered by: Michael V.