Hello there!

I recently went through myself and completed this trial. Thought I'd give a save file that has a ton of room for completion.

This save has all objectives complete, except for 1 captain.

All you need to do is kill that one captain. Look at the army page and determine what quadrant he is in. You have 10 minutes to get that one kill.

To use this file, download from this link;

https://drive.google.com/file/d/1sAnYxlD1eux_LLRsNEcCGS-XAs821niE/view?usp=drive_link

Make a backup of your current save file elsewhere. You can find the save files in steam/userdata/YOURIDNUMBER/241930/remote

Once you put my file into there, load up the game and select Play -> Trials of War - > Continue

Open up the army screen and look for the red skulled mob on the map in the correct zone (For me was mid left).