Armies in the American Civil War of regiments from the same state. In the Confederate Army, a brigadier general usually commanded a brigade, and a major general commanded a division. The Federal Army, with no rank higher than major general until 1864, often had colonels commanding brigades, brigadier generals commanding divisions, and major generals commanding corps and armies. Grant received the revived rank of lieutenant general in 1864, placing him with clear authority over all of the Federal armies, but rank squabbles between the major generals appeared within the Union command structure throughout the Overland Campaign. The large numbers of organizations formed are a reflection of
General of the Armies appointment "to the office of General of the Armies of the United States" was never issued. Supporters of MacArthur would lobby for over two decades to have the general promoted to "six star general". As part of the preparation for Operation Downfall (the planned invasion of Japan), the United States War Department began drawing up invasion manpower requirements for a large force organized into several Navy fleets and Army groups. The Army also saw the need for a possible promotion of more officers to the rank of General of the Army, depending on the size of the invasion force, as