In case anyone else is interested here is what worked for me under Windows:
1. Create a folder for the game e.g. C:\Matrix Games\wirdosbox and a subfolder for Ctrl-F5 screenshots C:\Matrix Games\wirdosbox\capture
2. Download WiR 3.3 from https://www1.matrixgames.com/products/2 ... search.asp or http://ftp.us.matrixgames.com/pub/WarInRussia/ and unzip to C:\Matrix Games\wirdosbox\WarInRussiav3-3
3. Download DOSBox Staging from here: https://dosbox-staging.github.io/downloads/windows/ and unzip to C:\Matrix Games\wirdosbox\dosbox
4. Download the wirdosbox.txt file attached to this post. Rename it to wirdosbox.conf and place it in your folder: C:\Matrix Games\wirdosbox\wirdosbox.conf
5. Create a new text file in your folder called wirdosbox.txt and copy-paste this line into it:
dosbox\dosbox.exe ".\WarInRussiav3-3\wir.exe" -exit -conf "wirdosbox.conf" -noconsole
6. Rename wirdosbox.txt to wirdosbox.bat, click Yes when prompted. Use wirdosbox.bat it to start the game.
Enjoy and let me know if you have any questions.