*Talk to Janet and ask to join the Militia team.
*She will ask you to talk to Jack. Talk to him.
*Once, you talk to him he will give you a Militia Entrance Exam to pass the exam.
Image:Militia Entrance Exam.png
*Go to Crude Dungeon and speak to Cordelia. She will give you her proof.
Image:Cordelia's Proof.png
*Go back to Jack and talk to him.
*End the quest and you're part of the Militia team!
Note:
The following item can now be purchased.
Militia headband