How were ww1 and ww2 different from the cold war?

World War II: The soldiers lay in the foxhole in the dark, cold night. Armed to the "teeth" with rifles, M1 Medium tanks, and machine guns, they waited for the enemy to strike.
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World War I: The biplane zipped through the skies, showering its enemy with a small stream of bullets. Just one bullet took the enemy down, spiraling toward the earth, never to be seen again.
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Cold War:
"We are ready for launch in T-30 seconds! Final checks, final checks!"
Everyone waited tensely. This was the moment they would prove every other country wrong.
"T-10! Prepare for launch, prepare for launch!"
"T-5! Rocket ignition!:
"T-1!"
"Blastoff!"
The rocket, carrying a HUGE warhead, blasted off into space.
However, no country ever bombed each other. No one. Just a show. A competition. Who would win at the arms race?
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Unlike WWI and WWII, the Cold War was an arms race without any country bombing any other.