The Simpsons Season 8 Episode 25 - The Secret War of Lisa Simpson Episode Title:The Secret War of Lisa Simpson.Episode Description:Bart is enrolled in a military school after unintentionally pranking the whole town. After seeing the school Lisa decides she wants to join too. Lisa is the first female cadet and therefore gets to stay in her own private barracks. This move creates resentment among the boys at the facility and Bart refuses to speak to his sister. Later, Bart secretly apologizes and helps her train for a test. When Lisa has trouble completing the test Bart publicly encourages her at the expense of his own reputation, and she finally passes the test.