Find the rebel leader is a quest in Back in Action. At the beginning of the game, one of your tasks is to find Miguel Cordona, leader of the rebel forces, in order to get help in claiming back Arulco from the Queen. For that, you're hinted to ask locals about his location. The one to ask is father Walker in the church of Drassen. Once the city's been liberated, he will point you to Ira, who's in Herve's bar. There, you'll just have to talk to Miguel to complete this quest. Note: you can directly go to the hideout to talk to Miguel and ignore father Walker and Ira.