What historic battle would you fight in and what firearm would you use? If it was possible...?

I believe I'd like to place myself in the Valley of Elah, fighting for the Israelites against the Philistines. I'd have a .45 slabside for a sidearm, a Benelli M4 tactical for a long arm, and a Ma Deuce with plenty of ammo as my primary weapon. (Yeah, I know its crew served, but even the ancient Israelites would be able to hump the weapon and tripod and p ammo as necessary.) Of course, the story of David and Goliath would be altered considerably, wouldn't it?