A war trophy is something that someone takes from a person or place when they win a battle or a war. It's like a prize for winning the fight! For example, let's say two countries are fighting a war. At the end of the war, the country that wins might take something from the other country, like a piece of art or a special flag, as a trophy to show that they were the one who won the war. It can remind them of the victory and give them a sense of pride.