He launched a preemptive strike to prevent further conflict.
Он нанес упреждающий удар, чтобы предотвратить дальнейший конфликт.
Definitions
A preemptive strike is a military action taken to prevent an anticipated attack by an adversary, often executed before the enemy has the opportunity to launch their offensive. It is based on the belief that taking the initiative can prevent greater harm or loss.