I have finally begun reading the correspondence between my dad, my mother and my paternal grandparents.
What was interesting was the two months before they were married, the letters back and forth almost exclusively about if/maybe/when dad could get a pass or furlough to marry mom in May 1943, AND getting accommodations on a train with all troop movements. There were time table cutouts enclosed of Pennsylvania RR, with possible travel times with mom going from Pittsburgh PA to Champagne IL (Chanute Field) or dad traveling to Pgh. Even considered going to Philadelphia to catch the NYC? trains. They settled on a late May date, but the big unknown was that an arms forces could commandeer your train(s) for vital troop movements without warning, with absolutely no guarantee you could/would be re-scheduled (soldier or not).
But happy ending: dad got to Pittsburgh to marry mom, and I popped up early 1947 after dad was released late 1945 to the month and almost the day he was inducted!
There was so much more in these letters of "the good old WWII days", but of no RR consequence to this thread Here's hoping moderators don't delete a RR related story 
