You'll want to focus on specific base control first, and any officers in those bases might switch sides when the conditions are right. Make sure to get control of important spots like duangu eastern camp, then look for officers like ehe and shaoge who need to be taken down in order. The real trick is following exact steps like talking to chen tai first, then defeating specific officers in the right sequence, and picking dialogue options carefully when prompted.

A good point to remember is that officers are more likely to flip when their troops are worn down and morale is low so keep the pressure on their forces. If youre playing one of the empires versions you can use special cards like hidden poisons which makes things easier but the basic idea stays the same. Either way make sure youre completing whatever objectives the battle throws at you since those often trigger the actual defection events.

Tip: keep an eye on mission objectives since missing something like rescuing pang de at the right time can mess up your chances of getting specific officers to switch sides.