 The colors serve as such a symbol to all United States Army units. The change of command is a military tradition that is rich with symbolism and heritage, heading back to medieval times. In more recent times, the colors represent not only the heritage and history of the unit, but also the unity and loyalty of its soldiers. The key to the change of command is the passing of the unit's colors. The colors of the commander's symbol of authority, representing their responsibility to the organization. The passing of the unit colors represents the transfer of authority from one commander to another. Command Sergeant Major Agnion representing the backbone of the unit passes the colors to Colonel Estrada, signifying his last act of allegiance to him as the commander. Colonel Estrada passes the colors to Brigadier General Reagan, signifying the return of the responsibility of which he was entrusted and to ensure the unit is never without officer leadership. Brigadier General Reagan passes the colors to Colonel Alexander, signifying his trust in him and charging him with the responsibility of the unit and its soldiers. In accordance with Army Regulation 600-20, Paragraph 2-5 Alpha, the underside assumes command of the 16th Sustainable Brigade, effective 15 June 2023, signed Matthew H. Alexander, Colonel, United States Army, commanding. Colonel Alexander passes the colors to Command Sergeant Major Agnion to secure the colors in completing the exchange of the change of command.