battlefield
n.a piece of land where a fight or war happens. It can also describe a situation where people are arguing or competing very hard.
n.a location where a military engagement or battle occurs; figuratively, any arena of intense conflict or competition.
“The soldiers marched across the muddy battlefield.”
“Historians visited the ancient battlefield to study the remains of the defensive trenches used during the war.”
“The courtroom became a metaphorical battlefield where lawyers fought a high-stakes legal war over the company's intellectual property rights.”
“One of the keys to Ukraine’s success on the battlefield has been its scaling up of short-range, first-person view (FPV) drone production, where it now fields 16 drones to every Russian 10.”
“Thousands died , but the deal provided North Korea with valuable battlefield experience, as well as payment in arms, energy and direct financial support, according to reports.”
Common in culture and history writing
From battle + field.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.