Helicopter Sea Combat Squadron 26 MH-60S Knighthawks conduct anti-submarine operations near amphibious transport dock ship USS Mesa Verde during UNITAS Gold. This year marks the 50th iteration of UNITAS, a multinational exercise that provides opportunities for participating nations to increase their collective ability to counter illicit maritime activities that threaten regional stability. Participating countries and observers are Argentina, Brazil, Canada, Chile, Colombia, Dominican Republic, Ecuador, Germany, Mexico, Peru, U.S. and Uruguay.