Baseline (Widescreen) Solution & Issues
Select your resolution under Settings\Display, then exit and restart the game.
1280x768, 2560x1600 and Surround resolutions require manual input:
C:\Program Files\Ubisoft\Tom Clancy's EndWar\OfGame\Config\PCOfEngine.ini
[WinDrv.WindowsClient]
StartupResolutionX=
StartupResolutionY=
Vert- with a slight horizontal squish in non-16:9 widescreen.
Ultra/Super-Wide (21:9/32:9) Specific Solution & Issues
Eyefinity / Surround Specific Solution & Issues
4k UHD Specific Solution & Issues