《六韬·虎韬·火战》
我军在烧出来的空地上排兵布阵，派手执强弓劲弩的勇武之士护卫在我军左右两侧，并继续放火烧掉我前后的草地。
吾按黑地而处，强弩材士，卫吾左右，又燔吾前后。
Our army formed up on the open space that had been burned out, and sent brave men with strong bows and crossbows to guard our left and right flanks, and continued to set fire to the grass in front of us and behind us.
<s>[INST] Kindly elucidate the central themes in this passage in English: 吾按黑地而处，强弩材士，卫吾左右，又燔吾前后。 [/INST] Our army formed up on the open space that had been burned out, and sent brave men with strong bows and crossbows to guard our left and right flanks, and continued to set fire to the grass in front of us and behind us.</s>
Kindly elucidate the central themes in this passage in English: 吾按黑地而处，强弩材士，卫吾左右，又燔吾前后。
user
Our army formed up on the open space that had been burned out, and sent brave men with strong bows and crossbows to guard our left and right flanks, and continued to set fire to the grass in front of us and behind us.
assistant