The united states and the soviet union became the two superpowers following world war ii. what did they do to go about defending their position to one another and the world?

Yay ww2 my best subject after ww2 becuse america droped the first 2 atomic bombs russia began arming its self with nukes to be prepaered america after hearing this began to arming its self sparking the arms race then the race to space and the cold war and vetnam