Military Marriage Problems??

I have just gotten married just a little over a month ago and already my husband is telling me that its not going to work and it was all a mistake. We had been dating for 2 1/2 years but he joined the army and when he was in basic he proposed to me. I noticed things changing right after he was told where he'd stationed which is South Korea on the DMZ line. After that he tried to break off the wedding but then he later after he had time to think about it he told me that he still wanted to marry me. So the wedding went as planned and now all of a sudden he doesn't want to be with me. He doesnt think we're compatible which doesnt make any sense to me. So anyways I guess what I'm asking is it normal for my husband to be unsure about us with what he's going through?