The term 'Battle Sites' can be summarized by the crossword solution 'ARENAS'. An arena is a large, enclosed area used for public events such as sports, concerts, and theatrical performances. Historically, ARENAS were also used as sites of battle, where two or more armies would fight each other. This type of arena was often surrounded by walls or other barriers to keep the combatants contained. In some cases, these ARENAS were also used for gladiatorial combat. Today, ARENAS are still used for battle, but in a much more symbolic sense, such as in professional wrestling matches.