If you get the chance and have the time, rent a car and drive to the Normandy coast to visit the D-Day invasion sites. Three days minimum would be needed.
Stay at Hotel Le Churchill in Bayeux (5 miles south of Omaha Beach)
Le Churchill Hotel Bayeux | Hotel Bayeux 3 stars France
https://en.wikipedia.org/wiki/Bayeux
And sign up for a guided D-Day tour with Overlord Tour:
https://www.overlordtour.com/?pk_campaign=Adwords-US-2&pk_kwd=d%20day%20tours%20from%20bayeux&gclid=EAIaIQobChMIw_TC6Jnv5gIVAtbACh2KJQOrEAAYBCAA EgIFg_D_BwE&cn-reloaded=1
I did this back in '07 and it was humbling to say the least. Bayeux was wonderful too. Lots of history.
If I can find them, I can provide you with D-Day GPS coordinates for your GPS and you can drive around on your own. You could spend a week there and not see everything.