DICT.TW Dictionary Taiwan

 drumhead court-martial
 戰地軍事審判

 Drum·head n.
 1. The parchment or skin stretched over one end of a drum.
 2. The top of a capstan which is pierced with sockets for levers used in turning it. See Illust. of Capstan.
 Drumhead court-martial Mil., a summary court-martial called to try offenses on the battlefield or the line of march, when, sometimes, a drumhead has to do service as a writing table.
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 drumhead court-martial
      n : a military court convened to hear urgent charges of offences
          committed in action