JAG US Army Judge Advocate General Corp Challenge Coin w/case. This is a great looking US Army Judge Advocate General's Corps challenge coin. Coin has reeded edges and is about 1 9/16" in diameter. All details are raised lettering and gold plated. Coin is contained in an acrylic air tight holder.The Judge Advocate General's Corps of the United States Army is the legal arm of the United States Army. The Corps is composed of Army officers who are also lawyers and who provide legal services to the Army at all levels of command, and also includes legal administrator warrant officers, paralegal noncommissioned officers and junior enlisted personnel, and civilian employees. The Judge Advocate General is a lieutenant general. All military officers are appointed by the U.S. President subject to the advice and consent of the Senate, but the Judge Advocate General is one of the few positions in the Army explicitly provided for by law in Title 10 of the United States Code, and which requires a distinct appointment. Officers who have already been appointed to another branch of the Army are administratively dismissed and simultaneously recommissioned anew as judge advocates, rather than merely transferring branches.