Disturbing the Peace is a music from the Plague of Shadows soundtrack. This is the battle theme of Plague Knight's attack on the Armor Outpost and on the Hall of Champions when training with the guards, and an upbeat arrangement of The Vital Vitriol. It is Music Sheet #8 in Plague of Shadows. It can also be listened to in Sound Test after completing the campaign once.
Music Sheet #8 is unlocked by giving Percy 16 Scrap Sheets.
"Big trouble make for exciting battle!"