why does the military have their own court
Military justice The United States Constitution authorized the creation of a system of military justice. Article I, Section 8 permits the U.S. Congress to "make rules for the government and regulation of the land and naval forces."[26] Congress issued these rules first in 1806 as the Articles of War. Military justice during the American Civil War was governed by the 1863 Lieber Code. The Articles of War were superseded in 1951 by the Uniform Code of Military Justice (UCMJ).
Military discharge To receive an honorable discharge, a service member must have received a rating from good to excellent for his or her service. Service members who meet or exceed the required standards of duty performance and personal conduct, and who complete their tours of duty, normally receive honorable discharges. However, one need not complete a term of service to receive an honorable discharge, provided the reason for involuntary discharge is not due to misconduct. For instance, service members rendered physically or psychologically incapable of performing assigned duties normally have their service characterized as honorable, regardless of whether they incurred the condition or disability in the line of duty, provided they otherwise met or exceeded standards. Similarly, service members selected for involuntary discharge due to a Reduction in Force (RIF) typically receive an honorable discharge, assuming their conduct while on active duty met or exceeded standards.