We Were Soldiers is a 2002 American war film that dramatizes the Battle of Ia Drang on November 14, 1965. The film was directed by Randall Wallace and stars Mel Gibson. It is based on the book "We Were Soldiers Once… And Young" (1992) by Lieutenant General (Ret.) Hal Moore and reporter Joseph L. Galloway, both of whom were at the battle.
We Were Soldiers is based on two books.
We Were Soldiers is based on at least one book but it is not given if it is based on 2. The system propably could not count the amount of books since they were given by their name and maybe it also failed to do the mathematical comparison.