The level of military aviation activity at Townsville began to increase after the establishment in 1966 of Lavarack Barracks and the Headquarters of the Third Task Force .
Lavarack Barracks steadily grew to become Australia 's largest Army base .
The level of military aviation activity at Townsville began to increase after the establishment in 1966 of Lavarack Barracks , which steadily grew to become Australia 's largest Army base , and the Headquarters of the Third Task Force .