The document discusses the beginning of the Cold War between the US and USSR after WWII. Even as allies during WWII, tensions rose between the two superpowers as they had opposing ideologies. They engaged in an arms race to build up nuclear weapons and delivery systems. Instead of direct war, they competed for political influence globally during the 40-year Cold War period. Canada aligned itself with the US in the emerging politics of the post-war world dominated by the US-USSR rivalry.

1. Canada in the Post-War World
The Cold War Begins

2. A New Kind of War
During WWII, the United States and the USSR had been
allies out of necessity
They had little in common except for their opposition to
the Axis powers
Even before WWII was over, tensions between the two
countries surfaced, and soon they were openly hostile
towards each other

3. A New Kind of War
Both sides built stockpiles of
nuclear weapons, biological and
chemical weapons, long-range
bombers, missiles, and atomic
submarines
This military strength made them
superpowers, each capable of
inflicting massive destruction