を振るった

used violence

→ を
phrase Rare #42,328
used violence Usually used in the expression 暴力を振るう or 暴力を振るった, meaning to use or have used violence against someone. 振るった is the past form of 振るう.
JA: 彼は家族に暴力を振るった。
EN: He used violence against his family.

奴らは暴力を振るったのです

They resorted to violence.

— さらば、わが愛/覇王別姫 (1993)