If you are using a widescreen monitor Mohaa doesn't have the menu options to take full advantage of your screen. You can edit unnamedsoldier.cfg to use widescreen. Make sure Mohaa is not running before you do this and back up your unnamedsoldier.cfg first.
open configs folder inside main:
C:\Program Files\EA GAMES\MOHAA\main\configs
Edit unnamedsoldier.cfg
Look for seta r_mode in the Cvars section and change it to -1
//
// Cvars
//
seta r_mode "-1"
Add these 2 lines in the Cvars section:
seta r_customwidth "1920"
seta r_customheight "1080"
If your monitor is different change the above numbers to match your screen size.
Enjoy!
cK