Backwards.
Whilst 'blackmail' might be a touch strong, when you are promised a tour by the deskie, do all that is asked of you, told that you will get a 6-12 month extension to cover a ROS but then it's flipped on you in an instance and you're told 'sign on for 5 years or your tour is cancelled and welcome to Afghan', that's pretty close.
I know leaving is the option, but there is somewhat of a sour taste right now.