What chicken dish is named for a battle in which Napoleon reputedly ate stew of whatever was on hand?

The chicken dish you're thinking of is called Chicken Marengo.

It's named after the Battle of Marengo, which was fought in Italy in 1800. Napoleon's army was outnumbered and outmaneuvered, but they managed to turn the tide and win a decisive victory.

Legend has it that Napoleon was so hungry after the battle that he ordered his chef to make a stew using whatever ingredients they could find on hand. This resulted in a simple yet delicious dish of chicken, tomatoes, onions, and garlic.

While the exact recipe of the original dish is lost to history, Chicken Marengo is now a classic French dish that features chicken, often braised in wine, with mushrooms, tomatoes, and herbs.