Stronghold Warlords is a new RTS game released on Steam recently. however. there is a common black screen issue when you start the game. here is a simple solution for you to fix this issue from the developer.
How to Solve Black Screen on Startup in Stronghold Warlords game?
Rename the folder Stronghold Warlords in the Documents or My Documents folder.
Browse to \Documents\Stronghold Warlords and rename the folder to “Stronghold Warlords_old”
Now try and run Stronghold Warlords again.
Credit to Firefly_Studios
It seems that the game has several bugs not only for the black screen. if you have any issues when you are playing the game. please let me know.