Hitler's foreign policy aimed to expand Germany's territory to gain Lebensraum or living space. This would be achieved through the conquest of Eastern Europe at the expense of Poland and Russia. Hitler saw the Jews and Marxists as obstacles to his plans for German domination. While historians debate whether Hitler had a clear long-term plan or was more opportunistic, most agree that the creation of Lebensraum through expansion eastward was the fundamental basis of Nazi foreign policy under Hitler's leadership.