jackboots
n.
（过膝的军用）长筒靴( jackboot的名词复数 );
铁靴政策（强迫别人屈服的粗暴手段），压迫者;
马靴;
例句:
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Deloncle's men marched through Paris in jackboots and tunics, cataloguing Jewish property for expropriation.
来自NEWYORKER
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As the curtain rises, female soldiers in jackboots march forward, wielding flags emblazoned with the hammer and sickle.
来自NPR