プログレッシブ和英中辞典(第4版)の解説
こうせい【攻勢】
an offensive (movement)
攻勢の offensive
攻勢に転じる
go on the offensive
軍は攻勢に出た
The army 「took the offensive [launched an offensive (operation)].
平和［外交］攻勢
a peace [diplomatic] offensive
労働攻勢
a labor offensive
テロ攻勢
a wave of terror [terrorism]