I'm not a Southern Rock fan myself. But, my mom is/was. And things like that, concert footage from 1974, hearing a song from BOA, or Marshall Tucker or Lynyrd Skynyrd or the Allman Brothers reminds me of my mom being young and us going to the family pool on post while my dad was in the field. It reminds me of the drive from Ft Hood to Ft Sill for a PCS move. It reminds me of watching the news coverage of the tail end of Vietnam as a kid and not understanding why my mom was crying since my dad was just at a meeting and going to be home in a while.
As bean alluded to, that f-in war took a toll on the men and women who were there, my dad will barely talk about things. But it also took a toll on the wives and kids who missed them and couldn't understand the changes when they came home. My dad paid a price, so did my mom and I. Keep in mind, the part in We Were Soldiers where the cab drivers were delivering the telegrams to the families of troops killed? My dad was in C Co 2/7 CAV prior to the deployment, then back filled in his old unit after the Ia Drang Valley. My mom was at Ft Benning during that time, had friends that got those telegrams and even got a knock on the door from a cabbie...all he wanted was directions to another house.
It's no different than the soldiers and their families now. The soldiers bring it home, their families can't understand but try and then get frustrated when they can't fix things.
That music isn't my favorite, I actually like what my dad listened to during those times way better. But the memories I have of my mom are brought to life by things like that and are far different than and more intense than the memories I have listening to the Stones, the Who, the Animals, The Stooges or other bands my dad listened to. And many of those memories are tied to things my mom brought with her from that war.