What was instrumental in helping German tanks move quickly through the enemy lines?

Speed

Explanation:

The German way of winning in the early stages of the war relied on a tactic known as "Blitzkreig" Or "Lightning war" What they would do is tanks would charge across enemy lines. Troops would encircle the enemy forces and  the supply lines would be in the back making sure a steady stream of supplies would reach the front line. So if your asking how they were effective in moving through enemy lines their you are.

yes based on alexanders actions he deserved the title of "the great". his empire covered about 3,000 miles and he was able to establish the empire over a 13 year period of time. he was able to conquer many different places. he also defeated the persians. he conquered egypt and developed a city and named it after himself.