How do you get Garm Bel Iblis on Star Wars empire at war forces of coruption?

To unlock Garm Bel Iblis in Star Wars: Empire at War - Forces of Corruption, you must play through the Galactic Conquest mode. He becomes available as a hero for the Rebel Alliance after you complete certain objectives in the campaign, particularly by capturing specific planets or defeating key Imperial forces. Once you meet the conditions, he will appear in your unit roster for recruitment. Make sure to check the specific Galactic Conquest scenario for any unique requirements.