The 5th Army, also known as the United States Fifth Army, was a prominent American army formation during World War II. It played a crucial role in the Italian Campaign, fighting in numerous battles and campaigns such as the Battle of Anzio and the liberation of Rome. The 5th Army consisted of both American and British forces, and its leadership included renowned generals such as Mark Clark. The 5th Army's success in Italy helped pave the way for the eventual defeat of Nazi Germany.