Abraham Lincoln, from letter to Erastus Corning and Others, 12 June 1863:

He who dissuades one man from volunteering, or induces one soldier to desert, weakens the Union cause as much as he who kills a Union soldier in battle. Yet this ' dissuasion or inducement may be so conducted as to be no defined crime of which any civil court could take cognizance. . . . [The] provision of the Constitution that 'the privilege of the writ of habeas corpus shall not be suspended, unless when, in cases of rebellion or invasion, the public safety may require it,' is the provision which specially applies to our present case. This provision plainly attests the understanding of those who made the Constitution, that ordinary courts of justice are inadequate to 'cases of rebellion'—attests their purpose that, in such cases, men may be held in...