You can't change the past (though apparently the future can, if you've read that article going around about quantum mechanics lately). However, many of us like to think that we can. We'll do recreations and "what-if" scenarios. Well, this summer, Warlord Games is letting you recreate WWII through Bolt Action via their Summer Offensive.
It'll be pretty simple, just sign up on the Warlord Games' website. Just come up with a name for your force and list your army you'll be running (not the specific set of models, but just the faction you've chosen). From there, just play as many Bolt Action games as you want. Then go and report your battles on the website. There'll be interactive maps showing how things are going.