The Cold War origins 1941-56 - EdexcelThe Cold War intensifies

Just as the 1960s started swinging and a new US President entered the White House, the Cold War entered its most critical phase, when the world would be pushed to the brink of nuclear war.

Part of HistoryThe Cold War and Vietnam

The Cold War intensifies

After 1948 the Cold War entered a new phase. It moved beyond the borders of Europe into Asia and even into space! At the same time, the USA and greatly increased their caches of nuclear weapons.

NATO and the Warsaw Pact

After the crisis of the in 1948-49, Europe became divided into two opposing armed camps: the US-backed (the North Atlantic Treaty Organisation) countries on one side, and the countries of Eastern Europe and the USSR on the other.

A map of Europe showing the countries that joined NATO and those who were members of the Warsaw Pact
NATOThe Warsaw Pact
FormedApril 1949May 1955
AimsTo resist an attack by the USSR on the USA or its Allies in Western Europe, based on the principle of collective security and that an armed attack on one of its members was an attack on them allTo resist an attack on the Soviet bloc by the USA or its NATO allies. This group, along with Comecon, would become even more important in keeping the Soviet bloc together after 1956 when Cominform disbanded
MembersUSA, UK, Canada, West Germany, Portugal, France, Belgium, Holland, Denmark, Iceland, Italy, LuxembourgUSSR, Poland, Hungary, Czechoslovakia, Bulgaria, Romania, East Germany (GDR), Albania
Formed
NATOApril 1949
The Warsaw PactMay 1955
Aims
NATOTo resist an attack by the USSR on the USA or its Allies in Western Europe, based on the principle of collective security and that an armed attack on one of its members was an attack on them all
The Warsaw PactTo resist an attack on the Soviet bloc by the USA or its NATO allies. This group, along with Comecon, would become even more important in keeping the Soviet bloc together after 1956 when Cominform disbanded
Members
NATOUSA, UK, Canada, West Germany, Portugal, France, Belgium, Holland, Denmark, Iceland, Italy, Luxembourg
The Warsaw PactUSSR, Poland, Hungary, Czechoslovakia, Bulgaria, Romania, East Germany (GDR), Albania

Clearly, by 1949 a large proportion of the world had been divided along ideological lines – with one side aligned with the USA and the other with the Soviet Union. While these alliances were not specifically in conflict with one another, it was clear that a spat between any two members of opposing alliances could easily escalate into a much larger conflict.

When you reach this part of the Cold War, focus tends to swap from the individual leaders to the events themselves. Some students continue to talk about Truman and Stalin when, in fact, both are gone!

Look at the table below so you are secure in your understanding of when the leaders of each superpower changed.

A timeline showing the leaders from the United States of America, on the left, and Soviet Union leaders, on the right