1 - starting area
2 - destination (observation area)
3 - enemy patrol
This task will appear on your list a short while after the cut-scene has ended. It would be a good idea to listen to a short radio transmission. Proceed to a lower level and approach the burning buildings. Thankfully, you won't encounter any enemy units here, so you may proceed north-east right away (screen).
You should be able to get a small bridge in a few seconds. I'd strongly recommend that you stop here. Use your binoculars and you'll notice a small group of enemy units. Korean soldiers will probably blow up an allied humvee (screen). Now you've got to make an important decision. You can decide to fight them or you can try avoiding them and focusing only on getting to your destination. I would recommend choosing the second approach, especially since you're equipped poorly at the moment.
If you do want to fight them, you'd have to lay down on the ground and attack them from a larger distance. Activate cloak function of your suit and proceed east. This will allow you to hide inside the forest (screen). I would recommend that you keep using the cloak. Obviously this will deplete your armor's energy, so each time you must lay down on the ground, disable cloak and wait for it to regenerate.
Eventually you'll get to a river (screen). I assume that you're far away from enemy units by now, however you can still keep using cloak just to make sure that you won't get caught. Keep moving east. It would be a good idea to stay near the river at all times, so you won't have to worry about getting lost.
You should be able to get to a second bridge in just a few seconds. You won't encounter any Korean soldiers here, so you won't have to use cloak anymore. Instead, approach the rocks (screen) and use maximum strength option. This will allow you to return to the main path and you'll be allowed to continue with your journey.
Obviously you'll have to keep moving east until you've reached an observation area. Approach the small barrier and enjoy huge bombardments (screen). You can use your binoculars for a better view of the situation. Sadly, enemy units have arrived in the area. Make sure you're not seen, because you'll want to surprise them later on.