The general premise of the game is simple: Use the men and resources you have/can get to complete the objectives. Now, you should be able to start playing. Don't worry, you'll get used to it, but keep in mind that: Right clicking is for selecting and canceling things, and left clicking is for performing selected actions.
It's an old game, and developers at the time thought it was a good idea.
The first thing you'll notice when you try to play the game is: Left clicking does not select, right clicking does. Don't mind my (currently) low playtime, I only recently got it on steam, but I have played it for way longer back when I was younger. Hello everyone, this is Tricking Trapster with a guide to my favorite game ever, Commandos 2: Men of Courage.