Usage patterns
〈場所〉が戦場となるfor a place to become a battlefield
This town once became a battlefield.
戦場に行くto go to the battlefield
He went to the battlefield while still young.
戦場で戦うto fight on the battlefield
The soldiers fought bravely on the battlefield.
戦場から生きて帰るto return alive from the battlefield
He managed to return alive from the battlefield.
〈場所〉は戦場だused metaphorically to say a place is chaotic like a battlefield
The store on the first day of the sale was like a battlefield.
