 The U.S. Army intends to maintain the dress blue uniforms for ceremonial use.The U.S. Army's uniform regulations also define a class of "special ceremonial units," that are authorized to wear distinct ceremonial regimental uniforms for ceremonies and public duties.They include select U.S. Army band and guard units, including the 3rd Infantry Regiment's Commander-in-Chief's Guard, the First Troop Philadelphia City Cavalry, and some National Guard.