expression, godan verb (-ru)
take a firm stand in argument; argue vigorously
Rare, unorthodox version of 論陣を張る. Used when someone strongly defends a position or engages in a heated debate. The standard expression is 論陣を張る.
See also: 論陣を張る
彼は会議で論戦を張って自説を譲らなかった。
He took a firm stand at the meeting and wouldn't give up his opinion.
論戦を張る is sometimes used as a variant of 論陣を張る.