If a new design is to be made, careful study is made of the history and battle honors of the unit. The most important decorations, honors, combat service and missions are represented in the design of the insignia. Sometimes two centuries of history are condensed into symbolism for one distinctive unit insignia. A proposed design is created and sent to the commanding officer for review and concurrence. Upon concurrence by the unit commander an official letter of approval of the distinctive unit insignia is sent to the unit.