Which of the Following Statements About the Mexican-American War Is

Which of the following statements about the Mexican-American War is NOT true?

A) It was America's first major military war outside the U.S.
B) Several prominent Americans opposed the war.
C) Many more Americans died of disease than died in battle.
D) The fighting lasted two years.
E) In terms of the percentage of combatants killed, it had the lowest death rate of any war in American history.