Germany invaded Russia to achieve the oil Rich regions along the Caspian Sea. Germany late in the war was finding logistical problems to be quite a nuasance. How can you field an army if they have no equipment. In order to get the oil reserves he needed, Germany's were quickly dwindling, Hitler decided to invade Russia. He needed to oil for his armored troops, which was for the most part the main backbone of the German Army. It was called operation Barborossa.