Copy the Export String from ASOIAF-Stats into the field below..

Open Builder in asoiaf Stats.
Load the Army to copy.
Copy the list to the clipboard using the "Copy Army to Clipboard" button.

Open https://brumbaer.de/AsoiafWar
Paste the contents of the clipboard into the Textfield (1)
There will be an unpronouncable text.
Click "Copy to Clipboard" (2) or select the string and use copy from the edit menu.

In Warcouncil go to "My Armies" and select "Import" from the top right menu