I think you are referring to the mission 6 of the Halo : Combat evolved. According to one of Gamefaq's Guides, the escape has to be done as follows. ---QUOTE--- Your mission plans have been changed.
Now that you know of the flood, you have to get out of the building. Head left up the ramp. Infected flood will be waiting for you.
Wipe them out. There are two medical kits on the other side if you need them. Go through the door and look both sides for flood.
Look down and fire rounds into the flood below. Watch out, they can jump on to the platform you are on. Grenades also work nicely.
Once the area is cleared, follow the ramp right to the next door. Take out some flood from above in this area and drop down to finish rest off. There are two open doors here.
Take the one below a pinkish light. Prepare for swarms of flood, both the infected type and popcorn crabs as you open the next door. Also be aware of the flood on the ledge above you.
Cross the room and on the right side, you will see a bunch of things stacked up like a stairway. Hop up to the upper ledge and go through the door. On your left will be two medical kits, some ammo and a shotgun!
I recommend that you keep an assault rifle and a shotgun. Go through the door in front of you and cross the room to the door on the other side. Look to your left and clear the area of flood with a shotgun.
Get on the lift and go down. As you reach the bottom, dozens of flood will be waiting for you. Take out the infected ones with a shotgun and use you assault rifle on the popcorn crabs.
Proceed to the next area through the little arch. Pick up and active camaflouge on your right and jump down. Somehow, the flood can still see you.
Take them out with a shotgun and also shoot the one above you. Proceed through the opening, going immediately right. Shoot the flood in the cubby-hole type room and turn around.
Some more flood will come to you. Shoot them but, wait a few seconds to make sure they are dead because sometimes they get up again. Get out of the cove, turn left, then right again into another alcove across from the one you were in before.
Kill the flood here and take out the ones coming in. Then proceed to your left into the new area. Look around and take out the flood here, although there aren't much.
Go to the back of the room where you see some fire. Jump on to the ledge (there is also a medical kit here) and go up the ramp to the higher level. Make your way to the door and beware of any other flood.
Open the door and take out the few flood that come in. Go through, cross the ledge to the other side and go through that door. Beware of flood coming in and open the next door.
Go to your left and take out the flood. Some flood will jump up from below. Take care of them and look down to shoot the rest of the flood with your shotgun.
Jump down and enter through the door. Go through the next to encounter more flood. Kill these and also the one above you.
Proceed through the next opening. Go to the alcove on your right, take out the flood, and do the same for the one on your left. Then go into the next room.
Take out the flood and be aware that there may be some above you. Get onto the bloody ledge on the other side. There is some ammo and a medical kit.
If you look toward the center of the room, you will see a ledge. Make a running leap from an angle to get on it. Follow the walkway to a door on your left and go through the next door.
Shoot the flood down below. If you fall off, jump to the small ledge and enter the door. Eliminate the flood in both alcoves on both sides and go forward to end up in the same room as before.
Once you are done, press X on hologram. Equipd your shotgun and run across the energy bridge. Dozens of flood will pour out from this opening.
A series of plasma grenades and shotgun rounds should take care of them. Move into the opening, kill any flood, and take the elevator up. Once you are up, you will meet up with some marines.
Next to the exit out of the building is some ammo and medical kits. Take them and proceed to exit the building back out into the swamp. Advance into the swamp, killing flood as you go.
Follow the yellow dots (marines) on your radar to some sort of building in the middle of the wate. Run to it and turn around to take out some more flood. Wait a few seconds and you will see a purple dot floating in the air.
Some ships will fly around shooting some kind of laser. Stay where you are. After a few seconds, a cutscene will take place ending the level.
---QUOTE--- I hope this is what you asked for. If this is not what you expected, then refer the full guide by visiting the http://www.gamefaqs.com/computer/doswin/file/291594/15651 link in the source.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.