Final answer:
To industrialise and modernise the USSR, the fear of invasions encouraged the Communist Party to support a range of strategies under the leadership of Joseph Stalin.
Step-by-step explanation:
The fear of invasions in the USSR led to Stalin's support for rapid industrialization through the Five-Year Plans, aiming to increase industrial capacity and ensure military and technological superiority. This was part of a broader strategy of opposing imperialism, spreading communism, and enforcing totalitarian control over the Soviet populace.
Chief among these were the notorious Five-Year Plans, which aimed at rapid industrialisation and increasing the industrial capacity of the Soviet Union to rival that of Western powers.
In addition, these plans contributed to full employment and economic growth during the early 1930s.
The industrialisation efforts also coincided with the need for military and technological superiority, as the Soviet Union considered itself the chief opponent of European and US imperialism.
This opposition led to backing communist movements worldwide and supporting decolonisation efforts in Asia and Africa.
Consequently, Soviet foreign policy involved strengthening control over Eastern European communist states while encouraging revolutions elsewhere.
Domestically, the push for modernisation included totalitarian measures to control aspects of citizen's lives and suppression of opposition, aiming to transform society according to Marxist principles while also defending against expected capitalist interventions.
This transformation included raising consciousness among workers, and seizing resources from Eastern European countries to finance military operations.