Hi, I am joining up soon enough and I have a quick question about my service number. I have taken the oath and I was given my service number then. This was my previous service number when I was a RM recruit. When I was leaving the marines, JPA was just coming into place at Lypmstone. At my oath, I was told that my service number might change when I arrive at basic training. Just asking if anyone would know for definite. Thanks in advance.