World of Warcraft Quests involving Commander Duffy:
Western Plaguelands Alliance & Horde
A Matter of Time (needs reward) Use the Temporal Displacer near one of Andorhal's silos and uncover Temporal Parasites.
Slay 15 Temporal Parasites, and then return the Temporal Displacer to Chromie in the Andorhal Inn, Western Plaguelands.
Western Plaguelands Alliance Quest
All Along the Watchtowers Using the Beacon Torch, mark each tower in Andorhal; you will need to stand in the doorway of the tower to successfully mark it.
Once all four towers are marked, return the Beacon Torch to Commander Ashlam Valorfist in Chillwind Camp, Western Plaguelands.
Capture a Mine (Alliance) Capture a mine that the Stormpike does not control, then return to Sergeant Durgen Stormpike in the Alterac Mountains.
Alterac Valley Alliance Quest
Fallen Sky Lords (Alliance) Travel to Frostwolf territory and search for Wing Commander Slidore, Wing Commander Vipore, and Wing Commander Ichman. Return to Commander Duffy should you complete your mission.
The Stones That Bind Us - (Step 3) Free nine Servants of Razelikh, three Servants of Sevine, three Servants of Allistarj, and three Servants of Grol. Return to the Fallen Hero when your task is complete. You must remain within close proximity of the stones or the process will fail.