It's finally time to rescue Joseph Welsh. After you help him deliver the important orders, you'll be sucked into one last battle for the Union. If you need any help surviving this search and rescue mission, then just take a look at this part of the guide.
Finding Welsh
The pace is changed a bit for this one. Advance along the path until you get to the main road. Wait for the main group to pass and then charge out. There's about 5 Confederates patrolling the road. Pull out the pistol and fire a few rounds into each of them.
Advance further along the road, and then stop when you see the first Confederates moving toward you. If you keep going forward, you're in danger of being overwhelmed and surrounded. Hang back and use the pistol and musket to keep wearing away at them. There should be about 10 in total, but they wander along slowly.
Once you get to the end, you should be able to cross the lake and meet up with Welsh. Just stay low until the cavalry passes to survive. Go ahead and run away when Welsh tells you to do it. Just follow the road and turn into the large area with all the fields.
Finding Stevens and Potter
I can't really give you a guide for this part. You need to make it across the series of fields. There are about 4 Confederate patrols with 5 men each. Just move carefully, stay low, and keep moving while you fight. Use the map to spot them before they find you. The pistol works quite well in this battle. Also, start keeping an eye out for a Henry rifle from this point onward.
It's actually pretty peaceful once you make it to the road. Just go up to the big house and talk to Stevens. Things don't turn out so great for him though. Run away from the Confederate forces. Just go down the path and try to make it to the bridge. Welsh will teleport to this checkpoint as soon as you get there. The Confederate forces should also trail off as you run.
The next step is to find Potter in the field. Advance a bit and get the drop on a few Confederates at the edge of the field. They should be easy to kill quickly at this range. Advance into the field and make a push into the little crater in the center. There's a few Confederate guarding the position. Just move quickly and fire. Grab the letter from Potter's body and then get ready to move. There is no reason to fight the group to the left of the field. Just move down the center and curve to the right. Push right through the 4 guards by the brick building. Then just run down the road and jump into the ditch by the bridge. Trigger the objective marker to get your next point.
Darkest of Days Walkthrough - Arc 2
This second part of Darkest of Days really heats up. You'll need to hijack a zeppelin, finally rescue Welsh and Petrovich, and take part in the final confrontations for Antietam and the Russian front line. If you neeed any help turning the tide, then look here for help.