describe Reagan's cold war leadership included peace through strength.
"Peace through strength" is a phrase that suggests that military power can help preserve peace. It is quite old and has famously been used by many leaders from Roman Emperor Hadrian in the first century AD to former US President Ronald Reagan in the 1980s. The concept has long been associated with realpolitik.
Reagan escalated the Cold War with the Soviet Union, marking a departure from the policy of détente by his predecessors, Richard Nixon, Gerald Ford, and Jimmy Carter. ... Indeed, Soviet leaders became genuinely concerned. Reagan supported anti-communist groups around the world.