During the 1970s, military assistance and arms transfers reached unprecedented levels. In 1970, arms transfers alone totaled slightly less than $6 billion, and other forms of military assistance such as training and construction added considerably to this total. By the end of the decade the United States and the Soviet Union each had surpassed the $6 billion mark in official arms transfers annually. Meanwhile, total official world arms transfers had grown to more than $21 billion per year. 1