For this achievement you must visit systems that have 'conflict zones'. These zones will be visible from supercruise in systems that are experiencing war or civil war (you can check this by finding systems via the galaxy map). After you enter a conflict zone you have to go to your systems tab and "choose faction". This means you are picking a side to fight with. Destroy enemy ships (red on your radar), then go to a starport, select 'contacts', then turn in combat bonds. Once you reach combat bonds totalling 50000 credits, the achievement will pop. This may take several trips to the combat zones. Happy hunting!