German leaders would not settle for controlling only parts of the territories they wanted.
The main idea of the quote is that the Soviets are tightening their contol over Cnetral and Eastern Europe. The other sentences complete that idea by letting us know what they are doing with Central and Eastern Europe.
B. The establishment of women's colleges throughout the US
At the end of WW1, Germany had to agree to The Treaty of Versailles, which basically took away most of the countries rights and put them into a deep depression. The economy was failing, people were poor and hopeless. When Hitler came into play, people were desperate for a change and Hitler promised to make Germany the greatest country of it's time. Because the country was so desperate for hope for the future Hitler could do anything he wanted because everyone was hoping it would improve the conditions excessively.