Back in the fight achievement work around/fix.
After spending countless hours of trying to complete extra tours to get this achievement to unlock I tried something different and got it to work. Here is what you have to do.
1. Reach as close as you can to 50,000 points for your next tour. Any number under 50,000. I personally got to 49,605. Once you do that head to the dashboard.
2. Go to the settings in the dashboard and delete everything for medal of honor. Save, title update, HD update, Online pass, and the limited edition extra content given with the pre-order of the game (Bonus character).
3. Now start up the game and redownload the title update for 58MB. After that download the 1.7GB HD update. Finally you will be asked to download your online pass again. Do not download the extra character content that you previously deleted.
4. This is the important step. Before you start your next game go to battlog.com and use your nation tokens. Must have at least 10 tokens to get a badge. Now start up a game and finish the last couple hundred points you need and the achievement should unlock. Make sure when you start the game you get a badge that is called war fighter nation. Hope this helps anyone having problems.