The nation of Israel was at war with Jabin, King of Canaan.  Deborah helped devise a battle plan to lead the children of Israel to victory.  She spoke with Barak (the leader of the Israelite army.)    Barak asked her to accompany him to battle.   The Israelites won the battle.  Deborah prophesied that the other army’s leader would be killed by a woman, and he was.  Because of this, Deborah is known as a prophetess.  She is also known as the “mother of Israel.” 

(If you’re unfamiliar with this series, check out my first post about Women of the Bible.)  In the LDS manuals, Deborah is known as “a great friend”, but not as a prophetess.  Why do you think that is?