MW4 DMZ Operation Iron Citadel Walkthrough
Reported by one source (DMZ Codex), read 21 October 2026. Not official and not yet confirmed by a second source.
Operation Iron Citadel is an MW4 DMZ Story Mission at Chang-san Air Base. It has 7 objectives and pays $25,000 DMZ Cash, and it unlocks The LTV infil.
| Location | Chang-san Air Base |
|---|---|
| Mission threat | Not listed (area up to Extreme, official rating) |
| Rewards | $25,000 DMZ Cash; DMZ Codex also lists a Supreme Leader Access Card |
| Unlocks | The LTV infil (reported) |
Operation Iron Citadel objectives
- Approach Chang-san Air Base and find an Airbase Access Card
- Upgrade the access card at the marked server
- Find the armory doors inside the bunker
- Recover the three keycode parts and open the armory
- Collect the armory manifest and plant explosives in the armory
- Plant explosives on three strike aircraft
- Capture the SAM site and exfil with the manifest
Tick these off in the MW4 DMZ mission tracker; it saves in your browser.
How to complete Operation Iron Citadel
- Search the marked spots in the air base for an access card. The scan updates narrow the search area.
- Take the card to the marked server and start the upgrade. Hold the area until it finishes, and pick the upgraded card up before you leave.
- Enter the bunker and find the armory doors. Visit the three marked keycode stations, then enter the code from your tracker at the armory keypad.
- Take the manifest from inside the armory, plant the charge and move clear of the blast.
- Plant a charge on each of the three strike aircraft, capture the marked SAM site, then extract with the manifest.
Tips for Operation Iron Citadel
- The Chang-san bunker is rated Extreme threat by Activision, the highest tier in DMZ.
About Chang-san Air Base
A fortified North Korean air base cut into a granite hillside, with a runway, helipad, hospital and barracks on the surface and an Extreme-threat bunker network underneath. See its named zones and threat levels on the Chang-san Air Base page, or find it on the MW4 DMZ map.
Key reward
DMZ Codex lists the Supreme Leader Access Card key as a reward for this mission. That key opens the Supreme Leader’s Bunker deep inside the Chang-san Air Base bunker, reported at grid B6.
Other MW4 DMZ Story Missions
- Operation Critical Extraction · Mirae General Hospital
- Operation Silent Ledger · Heavenly Luck Casino, Cheongun Village
- Operation Shopping Hacks · NuriGO Mall
- Operation Fallen Ember · Haneul Nuclear Reactor
- Operation Grid Assault · The Grid