The term 'GLADIATOR's Battleground' refers to an ARENA, which is a large, open-air space used for public events such as sports competitions, concerts, and theatrical performances. The term 'ARENA' comes from the Latin word for sand, as many of these spaces were originally filled with sand to absorb the blood of gladiators during their battles. In modern times, arenas are often used for sporting events, such as basketball, hockey, and soccer.