Well, I found a song called "The Blue and the Grey" by a group called Lucero on YouTube (click here), and I see that the lyrics are online at various lyrics sites. If that is the song, then I see they have other songs on YouTube that are war-themed, so perhaps the one about the family praying is there too.

Good luck with your search -- and by the way, for a request like this you should start a new thread titled something like "Lyr req: Songs by The Blue and the Grey", as people will be unlikely to find your question tacked onto a thread about a completely different song.