Ex parte Vallandigham

PETITIONER: Ex parte Vallandigham
LOCATION:

DOCKET NO.: None
DECIDED BY: Taney Court (1863-1864)
LOWER COURT:

ARGUED: Jan 22, 1864
DECIDED: Feb 15, 1864

Facts of the case

In 1863, soldiers arrested, tried and found guilty Democratic Sen. Clement L. Vallandigham of Ohio for violating Army orders against public expressions of Confederate sympathies. He had denounced the War and the Administration at home and in Congress. President Abraham Lincoln banished Vallandigham to rebel territory. He returned and appealed the action in the Supreme Court.

Question

Are the military proceedings constitutional?