how did the concept of lebensraum help hitler in proceeding his nazi plans

Dear Student,

a. Nazi's believed in creating a pure German race comprising of  the pure Nordic German Aryan race that was considered superior.
b.​ They considered Jews as those who belonged to the lowest rung had to be eliminated as they were thought of polluting the superior race.
c. Thus, Nazis believed in unifying the pure Aryan race all over the World, who would then dominate the World and become stronger.
d.  Hitler's argument was based on the concept of Lebensraum, or living space, which the Nazis believed that acquiring more territories would provide more space for human settlement.
e. Such a move, would expand the area of settlement of Germany, would expand Germany's influence and power  by occupying various territories and would establish  control over the resources. 
f. It would also help in establishing close links and ties of the new settlers to the actual place of their origin.
g. It is in this context ,Hitler  occupied Rhineland, integrated Austria with Germany, established control over Czechoslovakia and installed puppet regimes in various parts of Europe that aimed at glorifying Nazi rule and policy.He gave the slogan of  One people, One empire, and One leader.​
h. It rather helped him to pursue his expansionist policies.

Regards