The M18 Hellcat is an American tank destroyer used during World War II. It was designed for speed and mobility, featuring a powerful 76mm gun mounted on a lightweight chassis. Weighing around 20 tons, it could reach speeds of up to 60 miles per hour, making it one of the fastest armored vehicles of the war. The Hellcat was primarily used by the United States Army and played a significant role in various battles, including the Battle of the Bulge. Its combination of firepower and speed allowed it to effectively engage enemy tanks while avoiding direct confrontations.