I'm so upset right now!! Yesterday was my (our) 26th wedding anniversary. And basically my husband has ignored (not forgotten about) it.

But let me explain
This whole week, Dh is away on a training exercise for the Sheriff's department. He is on the Marine Unit, and they went upstate to train on a large lake with many other departments from around the state. He's been calling every night, sometimes twice the same evening.
I knew he'd be gone for our anniversary, but I assured him that was no problem for me. After 26 years, we rarely celebrate on the day other than an exchange of cards. We wait till the weekend, when we'll go out to dinner, or just take the time to relax together.
But last night, he didn't call me! I waited till 10pm, and I called him. He had fallen asleep and I had woken him. He was angry and grumpy that I'd called so late. I said "I wanted to say happy anniversary!" and his response was a grumbled "happy anniversary" delivered with no emotion at all. (well, no emotion other than annoyance)
I told him to call me tonight when he was on the way home, then I hung up without waiting for a reply.
Now, in my mind I fantisized that he'd shake off the sleepiness and call me back. No such luck, so I thought that maybe as he got his day started he'd send me an email or give me a call this morning. Nope.
I'm sitting here stewing. I'm so hurt and dissapointed. I think at this point if I see his number on the caller ID, I wouldn't even pick up the phone.
If he shows up without a card, or even an old wilted flower, I don't think I'll be able to speak to him civily.
Am I over-reacting?
*** OK, so guess what.. The phone just rang and it was him. I didn't pick up, because I'm feeling a little pissy right now and don't want to make things worse. His message was
"Hi, I'm on a break and I figured I'd give you a call. Talk to you later."
How generic can you get?
HELP! I need some perspective here. Not sure exactly why I'm feeling so angry and hurt. Maybe it's just another symptom of what I'm afraid is an increasingly apathetic marriage. He hasn't worn his wedding band in ten years. But he took care of me like an angel when I was sick all of last year. It's not that he doesn't love me.. I just wonder if he's stopped loving our marriage?