godan verb (-ru), intransitive verb
Used for attacking and breaking into a fortified place such as a castle or a house, often in a historical or military context. Conveys a forceful entry.
赤穂浪士が吉良邸に討ち入った。
The Akō rōnin stormed Kira's residence.
敵の城に討ち入る作戦を立てた。
They devised a plan to storm the enemy castle.