I wouldn't tell your spouse anything about the feelings and if you still think there are underlying sparks that could be ignited you should rethink connecting with this person. It could have adverse effects on your relationship.
You should not tell them any of it...BUT you should also not pursue anything, flirt etc with the other person!
If you are smart, don't breath a word about your feelings for this friend to anybody, let alone your husband. Your husband is the last person who should get to know this. Besides, he doesn't deserve to get this bad news that will trouble him for days.
If possible, don't ignite friendship with this 'friend' of yours as it may lead to more trouble in future.
Once the two people met and you not virgins and the two of you know that and you two are clean , there no point in bring up who and why you had a relationship with that person. Just make sure it in the pass and move on with you new married spouse. You and your spouse are one so you know dam well that telling her anything about who you screw will hurt her her so why tell her and why would you do that.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.