On 1 June 1959, the division was reorganized under the Pentomic structures. It consisted from that point of 1st Reconnaissance Squadron, 103rd Armor, 28th Signal Battalion, 28th Aviation Battalion, 1 BG-109 Inf, 1 BG-110 Inf, 1 BG-111 Inf, 2 BG-111 Inf, 1 BG-112 Inf, 1st Battalion, 107th Field Artillery Regiment (1-107 FA), 1-108 FA (Honest John), 1-109 FA, 2-109 FA, 1-166 FA, 1-229 FA, other combat and combat support units, and combat service support units, for a strength of 10,408, according to Divisional Strength reports of 5 June 1959.