In the middle of the battle that Deborah fought against king Jabin's armies, his top general named Sisera--the leader of all of Jabin's troops--saw that they were defeated and alit from his chariot and fled.  "...Sisera ran away on foot to the tent of a woman married to Heber the Kenite--because there was peace between king Jabin and the house of Heber."  Sisera was looking for protection.

 As he was approaching the tent, this woman, named Jael, went to meet him and said, "Turn in here my lord, turn in to me; fear not."  She hid him and covered him with a cloak.  He begged her for some water, something to drink.  She gave him milk, and  covered him back up.

Sisera then told her, "Stand in the door of the tent and if anyone asks if there is a man here, you say No."  I imagine he probably thought that she was just a mere woman and would do whatever he said to do.  But he badly underestimated Jael.  Huge mistake.  Jael's husband may have had an alliance with Sisera, but Jael didn't.  She sided with Deborah.

After he fell asleep, she pulled up one of the tent spikes, and "...went softly to him and drove the nail into his temple and fastened it--and him--to the ground."  The Bible says, "So he died."  I would think so!!  Pretty hard to recover with a tent spike through your head.

Deborah's general Barak came looking for Sisera.  So Jael went out to meet him and said, "Come, and I will show you the man whom you seek."  When Barak came into Jael's tent, Sisera was dead.

After everything was over and Deborah began to sing praises to God, one stanza of her song was to bless Jael.  "Blessed above women shall Jael the wife of Heber the Kenite be.  Blessed shall she be above all the women in the tent.  He asked for water and she gave him milk.  She brought him butter in a lordly dish.  She put her hand to the nail and her hand to the workmen's hammer...she smote Sisera and cut off his head after she had pierced him through his temples.  Sisera's mother will cry: why is my son's chariot so long in coming?"  Then all the ladies who were hearing Deborah sing answered her with  praises for Jael.

Jael.  What a woman.