The fourth Star Wars: The Old Republic class has been revealed today, and it's the Republic Trooper:
"Not all heroes carry Lightsabers. Some just have the will to fight.
For decades, the armed forces of the Galactic Republic defended their civilization against the seemingly unstoppable Sith Empire. Despite countless setbacks, the men and women of the Republic military never backed down until the Senate ordered them to do so. These brave souls remain ready and willing to lay their lives on the line today."