What about this?
Day 1 - Bayeaux
You could rent a car or go by public transport. If you do rent a car, do it out of the airport.
Bayeaux is one of the few places in Normandy that was miraculously not destroyed in the war. It retains a lot of beautiful medieval character.
There's a great little cathedral and the magnificent Bayeux tapestry depicting the Norman invasion.
Day 2 - Museum of Peace and the D-Day Beaches
There's a great Musueum of Peace in Caen with great historical sections on WWII, but also artifacts to our other great examples of man's inhumanity ot man - a piece of the Twin Towers, a slave's shackles.
They run good minibus tours of the beaches right out of the museum. There's a good cafeteria too.