Not being connected to the 10th Armored, until seeing your note I never visited their site.
Unsing InternetExplorer ver 6.0 latest update from Microsoft, I accessed the web site, clicked on Message board, looked at 2 postings, and clicked on the "Post New Message" button just below Tom Hanks banner. A posting screen opened up for fill in the blanks.
It is possible that the browser you are using is not compatible with their pages. Several older browsers such as Gecko, an old version built by Netscape will not open many pages.