As commander was named General lieutenant Petar Drapšin, as Political Commissioner Colonel Boško Šiljegović, and as Chief of staff, Colonel Pavle Jakšić. The Army was formed from the divisions of the 7th Corps (14th and 18th), 8th Corps (9th, 19th, 20th and 26th Dalmatian), 11th Corps (13th, 35th and 43rd) and later also the 9th Corps (30th and 31st). In addition the 4th Army had an Artillery, 1st Tank, Engineer and Replacement Brigade, a Motorized Artillery Battalion and a liaison regiment.[1]
^Pavle Jakšić; Nad uspomenama I, p. 8; Rad, 1990,{It consisted of about 40,500 Croats from Dalmatia, Littoral
and Istria (about 40% of the total composition of the Army), about 31,500 Serbs from Dalmatia, Herzegovina, Lika, Kordun and Banija (35% of the total composition)
and 18,000 Slovenes (20% of the composition).} Google books