Write a scene based on a moment in history.
There are a few ways to approach this...
1) Literally, show us your twisted take on the moment. Have your scene take place on the boat when Washington crossed the Delaware.
2) Show us the moment before.
3) Show us the moment after.
4) Peripherally show us. Maybe the scene is about two guys on the dock or between two of the soldiers in the back of the crowded boat.
And don't forget the option of Clash of Context or genre parody. Washington crossing the Delaware might be a nice Clash of Context with the film Titanic.
Here are two videos I made out of the editing class I took last week.