jackboots
n. (過膝的軍用)長筒靴( jackboot的名詞複數 ); 鐵靴政策(強迫別人屈服的粗暴手段),壓迫者; 馬靴
Jackboots are heavy boots that come up to the knee, such as the ones worn by some soldiers.
If a country or group of people is under the jackboot, they are suffering because the government is cruel and undemocratic.