Man is Born Unto Trouble

 is a mission in Red Dead Redemption.

Story
Irish claims that some miners have found a Gatling Gun, which is needed for the assault on Fort Mercer. Marston has to storm the mine, then push a mine cart with the Gatling Gun inside it and ride the rails out of the mine. Irish raises John and the gun to the surface with a lift and they load the gun on a cart, Irish leaves with the cart to bring the Gatling Gun to West Dickens.

Walkthrough
You start off your horse with two miners approaching you. At this point the game instructs you to use your dead eye to take them both out at the same time. This is not a bad option but not at all absolutely necessary, though. That being said, there won't be much need for your dead eye meter from this point forward, but go ahead and use it. Walk down the path and you will see three more miners to your left and four at the entrance of the mine. Take care of the three on your left with the repeater as you work yourself toward the mine. Take out the boys there and watch the one hidden right at the entrance. If you made it this far, the real work is over. I suggest using your repeater from this point forward and reserve your handgun ammunition as you will only be able to use your handgun at the end of the level.

Proceed down the mine shaft as you take out the miners. Look out for TNT barrels to take out those pesky hidden ones behind the crates. If you take your time and inch around corners while looking down your sites, you should be able to complete this portion without taking a hit. When you reach the cart follow the on screen tutorial as how to move it and don't worry you won't have to shoot your way out until the cart reaches the surface. Reach the yellow dot to get the cart up the shaft with Irish's help. After this point, you will need to make use of your sidearm as you cannot use a repeater while pushing the cart. The only tough shot is when you are approaching a downhill section you have to manual aim to take out a pile of TNT to blow up some big guys blocking your path. Kill some more miners to each side and get the crate to the waiting wagon. Cut scene and end of the mission

Tips

 * To get 100% accuracy on the mission stat simply don't miss on any of your shots, and get off the cart a bit before the last treasure hunter next to the dynamite barrel (so far it seems shooting objects lowers the accuracy), go next to him with a shotgun, line up the shot so it covers him and the barrel behind him, and let a shot loose, this should kill him and destroy the barrel as well. Now ride the cart to Irish.

If you get stuck hiding on wall/butrist then crouch (Push L3).