What was the reason the shipbuilding program mandated by Second Vinson Act was created ?
The Second Vinson Act updated the provisions of the Vinson - Trammell Act of 1934 and the Naval Act ( 1936 ) , which had " authorized the construction of the first American battleships in 17 years " , based on the provisions of the London Naval Treaty of 1930 ; this act provided the funding to build the " Iowa " class .