crusade
/kru:ˈseɪd; kru`sed/ n
1 any one of the military expeditions by the European Christian countries to recover the Holy Land from the Muslims in the Middle Ages 十字军（远征）.
2 ~ (for/against sth); ~ (to do sth) any struggle or campaign for sth believed to be good, or against sth believed to be bad （为争取好的或反对坏的事物的）斗争或运动
a crusade against corruption 反腐化运动. crusade, v [I, Ipr]
~ (for/against sth) take part in a crusade 参加十字军; 参与某种正义行动
crusading for fairer treatment of minorities 参与争取少数民族平等权利的运动.