Dear …
Please accept this letter as my notice of resignation. It is with regret that I must resign my position at __(name of firm)__, but I have recently been called to active __(type)__ Military duty and, therefore, have been left with no choice. My last day of employment will be __(date)__. I hope this allows you enough time to find a replacement. Please feel at liberty to call on me, during my remaining time here, for any assistance with training someone new for this position My experience with __(Name of organization)__ has been a very rewarding one and I want to thank __(name of organization)__ for the opportunity I was given to work for such a fine organization. I feel very fortunate to have been part of this team and I will miss the many relationships and friendships I have built here. To everyone who offered support and help whenever I needed it, I am grateful.
Thank you for the opportunity to gain this valuable experience. I wish __(name of firm) __ continued success.
Sincerely,