Parados

...an elevation of earth which is effected behind fortified places, to secure them from any attack that may be made in reverse. Parapet and parados come from terms signifying in the front or in the rear of anything.

Source: wiktionary

Although a parados takes up so much room, yet it may be turned to good account in the formation of blindages.

Source: wiktionary

In an enclosed work the interior can seldom be sufficiently covered from the enemy’s fire by the parapet, and it becomes necessary to build traverses or parados or both. The parados is only a large traverse built inside the work to cover the defenders who stand on the faces or flanks furthest removed from the enemy’s fire

Source: wiktionary

He stood up on the step; and then they both swerved, ducking quickly as something ripped up the air between them, flicked a stone from the parados, and sang, like the vibration of a tense wire, into the air behind them.

Source: wiktionary