Re-certify as an EMT-B?

Ok so I am an EMT -B and my certifcation is up in 2012. I am join the military as an EMT so i will have to back through a full EMT-B course. I wanted to know if since it is a full course and not a refresher course will it count for the full 72 hours or will I have to do other things to re-certify.