Dropped on Hiroshima and Nagasaki, which started U.S. nuclear monopoly.
Defense pact between the U.S. and its allies, excluding the Soviet Union - further escalated tension.
USSR test atomic bomb
The successful test effectively ended U.S. nuclear monopoly, which shocked U.S. officials who did not predict Soviets would develop an atomic weapon so quickly.
US develops hydrogen bomb
Further escalated the arms race.
Eisenhower's "New Look"
The new domestic and foreign policy sought to assert U.S. nuclear superiority through stocking nuclear weapons and funding research in missiles.
"Bravo" hydrogen bomb test on Bikini Atoll
The massive bombing on Bikini Atoll was a) demonstration of strength and b) successful testing of more hydrogen bombs.
The security pact between the U.S.' eastern front (including United Kingdom, France, Australia, New Zealand, Philippines, Thailand, and Pakistan) in order to combat Soviet control.
Formed to counter NATO, and acted as a security pact between USSR and its satellite states. Military tension between the two nations continued.
A warning issued by Russell, Einstein, and many other acclaimed scientists on the danger of the arms race - sought to end the testing of nuclear weapons.
Sputnik put into orbit
Showed Soviet's advance in the space race, and shifted U.S' perception of USSR in terms of technological superiority.
NASA was formed
Mostly to counter the Soviets' advance in space.
U-2 spy aircraft shot down
Ended the potential diplomatic solution to the Cold War between Eisenhower and Khrushchev.
Soviets test the Tsar Bomba
It was the most powerful bomb ever tested (58-megaton atmospheric nuclear weapon).
Cuban Missile Crisis
When Soviet missiles were discovered in Cuba, the U.S. immediately issued a blockade of Cuba. And from there, the standoff between USSR and U.S. began. The conflict nearly exploded into a nuclear war between the U.S. and the Soviets.
Nuclear Test-Ban Teaty
Kennedy's attempt at making peace with the Soviets, and partially banned nuclear testing (added more restriction to where and when one can test).
Non-Proliferation Treaty signed
An agreement signed detailing that all non-nuclear-weapon states must never acquire nuclear weapons, and that all nuclear-weapon states must begin disarmament.
Disarmament Rally in NYC
The biggest disarmament rally ever held - urging the United States to disarm completely.
Reagan and Gorbachev discuss nuclear abolition
Meeting between the two leaders in Iceland to discuss complete nuclear abolition.
Intermediate range missiles banned
The Soviet Union and U.S. sign the Intermediate-Range Nuclear Forces Treaty to eliminate all land-based missiles held by the two states with ranges between 300 and 3,400 miles.
Comprehensive Nuclear Test Ban Treaty
At the United Nations, the treaty was signed by China, France, the UK, Russia and the US. India refused to sign the treaty.
China turns Communist
UK nuclear test in Australia
France nuclear test
India nuclear test
Israel nuclear programme revealed
Revealed that Israel may have up to 200 nuclear weapons.