Here are the different type of levels, From Level 0 to Level 30.
Clan members start at level 6.
Level 0 : Visitor
Level 1 : City Hooker
Level 2 : Server Regular
Level 3 : Drunken Geek
Level 4 : Clan Friend
Level 5 : Trainee
Level 6 : New Recruit
Level 7 : Second Lieutenant
Level 8 : Lieutenant
Level 9 : Corporal
Level 10 : Sergeant
Level 11 : Staff Sergeant
Level 12 : Captain
Level 13 : Staff Captain
Level 14 : Lieutenant Colonel
Level 15 : Colonel
~Level 1-15~(Above)
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~Level 16-30~(Below)
Level 16 : Major General (Recruiter)
Level 17 : Lieutenant General (Co-Leader)
Level 18 : General (Leader)
Level 19 : Chief General (Head of AAT)
Level 20 : Master Chief
Level 21 : Visiting Owner
Level 22 : -
Level 23 : -
Level 24 : -
Level 25 : -
Level 26 : -
Level 27 : -
Level 28 : -
Level 29 : Chief Marshal
Level 30 : Supreme Owner