The Fifth Amendment to the Constitution provides that a person shall not "be twice put in jeopardy of life or limb" for the same offense. The petitioner, now in prison under a court-martial conviction for a serious offense, contends he is entitled to his freedom because another court-martial had previously put him in jeopardy for the same offense. The first court-martial was dissolved by the convening authority before the court reached a decision. The Government contends that the Fifth Amendments double-jeopardy provision, if applicable to military courts, did not bar the second court-martial conviction here because, as the Government views the record, dissolution of the first court-martial was dictated by a pressing military tactical situation. The circumstances from which these contentions arise are as follows.