reprisal       
noun [ C or U ] uk/rɪˈpraɪ.zəl/ us/rɪˈpraɪ.zəl/
 (尤指军事或政治的)报复,报复行动
(an example of) activity against another person, especially as a punishment by military forces or a political group
  economic/military reprisals 经济/军事报复 
 They promised that individuals could live freely without fear of reprisal from the military. 他们承诺说,人们可以自由生活,不必担心军方的报复。 
 The attack was in reprisal for the kidnapping of their leaders. 这次袭击是对他们领导人被绑架的报复。