 The southern contingent of attackers would move north along Route 13 from Moung Kassy.It comprised four Royalist battalions from Military Region 5 (MR 5), an allied battalion from Forces Armee Neutralistes (FAN), two M24 Chaffee tanks, three 155mm howitzers, supporting elements of both the 12th and 13th brigades, and six American advisers from Project 404.The northern contingent consisted of the 11th Brigade; it was airlifted over the Communists and landed north of them.