他发起了一场反对种族歧视的长期运动。

He started a long-term ___crusade against racial discrimination.

许多欧洲骑士参加了十字军东征，希望能夺回耶路撒冷。

Many European knights joined the ___Crusade in hopes of retaking Jerusalem.

她毕生致力于为环保事业奋斗。

She has ___crusaded for environmental protection all her life.