Why did the Soviet Union desire "defensible" borders and "friendly" regimes in Eastern Europe ?

Thew soviets desired "defensible" borders and "friendly" regimes in order to compete and protect against the capitalist west.

Explanation:

The more red countries, the better. The farther away the enemy bombs are, the better. The more miles it takes to get to Moscow, the better. The more influence over the world, the better. The more allies with manpower and industry, the better.

the dominoes began to fall. the surrender at appomattox took place a week later on april 9. while it was the most significant surrender to take place during the civil war, gen. robert e. lee, the confederacy's most respected commander, surrendered only his army of northern virginia to union gen. ulysses s. grant

explanation: