How much did reagans military build up cost?

Ronald Reagan's military buildup during the 1980s is estimated to have cost around $1.5 trillion in 1980s dollars, which would equate to over $3 trillion in today's money when adjusted for inflation. This increase in military spending included enhancements to nuclear arsenals, the development of new weapons systems, and the expansion of military personnel. The buildup aimed to counter the Soviet Union and strengthen U.S. defense capabilities during the Cold War.