I have made a module for “Sink the Bismarck” by 3W Games. How can I find out if I can post it in the Modules section here?
You can start by trying to contact the proprietors of the game, usually listed in the rules. If that fails to draw a response, I would go ahead and post it. If anyone claims copywrite infringement, they usually will send a “cease and desist” warning. If that is the case then you would have to remove the copywrited material.