Yes iron was used extensively by the Sumerians.
He added a new military system--Reagan instituted the "Star Wars" program increasing spending on missile systems.
Reagan's increase in military spending caused the Soviet Union to reply as they had in the past in the arms race with the US. The USSR was hurting financially and struggled to keep up with the arms race. This would eventually hurt the USSR's resources lending to collapse.
Indirect, meaning that people selected their leaders PS add me on snap chat :drezzy194
