"On 17 September 1944, thousands of paratroopers descended from the sky by parachute or glider up to 150 km behind enemy lines. Their goal: to secure to bridges across the rivers in Holland so that the Allied army could advance rapidly northwards and turn right into the lowlands of Germany, hereby skirting around the Siegfried line, the German defence line. If all carried out as planned it should have ended the war by Christmas 1944."http://www.rememberseptember44.com
What better way to commemorate that event than earning an achievement?
All you have to do to net your achievement is load up http://www.trueachievements.com/Brothers-in-Arms-Hells-....htm
(and/or the German and Japanese versions, which have separate achievement lists) at any point on the 17th of September and you will instantly get 50G to pop.
So what are you waiting for?