Claudia's daughter died in the one season..not sure if your referring to that.
It ended with Claudia and her husband getting ready to move away. But the previews show he moves without her and she stays behind.
Denise's secret is revealed(to her friends) about her affair and her husband finally files for divorce and that is a big story line.
If you go to the website it will update ya.
http://www.mylifetime.com/on-tv/shows/army-wives