Red Dead Redemption Walkthrough Part 24 - The Assault on Fort Mercer (4K) Our Red Dead Redemption walkthrough continues with part 24 The Assault on Fort Mercer. Finally, the time has come. It's time to head into Fort Mercer and bring your mark to justice.

When an M appears on your map after some time having been off of it, you know that it's Marshal Johnson waiting with his crew of ruffians, as promised, to storm the fortress. When you arrive, you'll find John alone, lighting up a cigarette and looking towards the fort in the distance..