caliga

Caligae (Latin; singular caliga) are heavy-soled military shoes or sandals worn by Roman legionary soldiers and auxiliaries throughout the history of the Roman Republic and Empire. They were worn by all ranks up to and including centurions.The sandals were constructed from leather and laced up the center of the foot and onto the top of the ankle. Additionally, iron hobnails were hammered into the sole, serving three purposes:to reinforce the caligaeto provide the soldier with better tractionto 'weaponize' the caligae (i.e. to allow the soldier to inflict damage by kicking with it)
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soldier's boot; boot; military service

CALIGA