To create a new thread in the forum, first choose which Sub Forum your post belongs in and head to the Sub Forum page. (For example, any introductions belong in the Introductions Sub Forum located here: http://matadoru.com/union/board/f/general/introductions/)
Once you’re on the page for the appropriate Sub Forum, you’ll see a search toolbar at the top of the forum. Switch the radio button from Search to New Topic, and you’ll see fields appear for a Topic Title and the body of your post. You must enter a Topic Title for your new thread, then create your post in the Body field. Hit Post, and you’re done!