Complex sentence: Mexico and Its War with the United States (2007) The war ended in a decisive U.S. victory, and as a result Mexico was forced to sell all of its northernmost territory, including California and New Mexico to the United States in the Mexican Cession.
Split into simpler sentences: Mexico and Its War with the United States (2007) The war ended in a decisive U.S. victory. As a result, Mexico was forced to sell all of its northernmost territory, including California and New Mexico, to the United States in the Mexican Cession.