MW4 DMZ Chemical Denial: crafting and server-defense routes

Use Chemical Denial’s active objective to choose your route. The completed runs documented by COD Central show two versions: chemical collection/crafting and power/server defense. They are community gameplay reports, not a universal sequence for every encounter.

Choose the route on your panel

Current objective	Continue with
Loot the Marked Item / Collect the Chemical Components	Chemical crafting
Turn on Power / Hack the Comms Server / Protect the Data Transfer	Power and server defense
Investigate a power outage, with no later step revealed	Follow that waypoint first; match the next objective before choosing either route

Start through Deploy or a Dynamic Ops phone, then confirm the title is Chemical Denial. Nearby Orders or Lieutenant objectives can appear alongside it; do not treat the entire HUD as one operation checklist.

Chemical crafting route

The reported completed sequence is:

1. Loot the marked item from the assigned trunk: Classified Documents in the documented run.
2. Collect three chemical components. The recorded names are Volatile Glutaraldehyde, Potent Acetic Anhydride and Crude Diethyl Ether.
3. Use Craft Compound at the marked workbench to obtain the Unstable Compound.
4. Deposit the chemicals in the marked case. Move clear of the explosion and check for Operation Complete.

Check the 0/3 component counter after each pickup. At the workbench, use the mission interaction; travelling to a regular 3D Printer is not a substitute for following the assigned crafting objective.

Do not spend the deployment searching every ordinary chemical loot container because an online run used a particular village. The operation markers and your component counter are the practical checks for this step.

Power and server-defense route

The second reported completion, at Cheonwang Peak Array, follows Turn on Power → Hack the Comms Server → Protect the Data Transfer → Operation Complete.

Stay with the defense objective until its progress finishes, then check the completion banner. Turning on the power or starting the hack is an intermediate action. If another step appears afterward, follow it rather than leaving because a different run ended there.

If your run begins at the Tank Depot

Official preview footage shows a power-outage investigation at the Tank Depot in Chang-san Air Base Bunker. That opening alone does not establish the full route or its ending. Follow the newly revealed objective; do not jump straight to the ingredient list or assume defeating Bale completes Chemical Denial.

If the next objective differs from both reported routes, this guide does not establish its solution. The active marker and panel take priority over a building or sequence copied from another deployment.

Missing prompt at NuriGO Mall

Infinity Ward’s launch patch notes list a fix for a missing Chemical Denial interaction prompt at NuriGO Mall on Nintendo Switch 2. Update the game before retrying that known case. The fix does not establish that every missing prompt on every platform has the same cause.

Confirm the finish and collect the reward

Wait for Operation Complete, then check the operation’s reward drop before leaving. A cash popup, an ingredient pickup or an unrelated boss defeat is not a substitute for the completion state. Exact cash, XP and crate contents are not fixed by the examples above.

If you are completing Operation Rewards, check its Cheongun Village phone and crate-looting requirements separately. The Dynamic Ops hub explains how completed operations and reward crates fit together; the exfil guide covers getting the loot out.