Answer:
he Blitzkrieg was so effective because it was "designed to create disorganization among enemy forces through the use of mobile forces and locally concentrated firepower" . This allowed the Germans to have the upper hand when attacking and often was the reason for their success.
Explanation:
OPEC was protesting because the U.S. was supporting the Israeli military leader during the Yom Kippur War.
Germany as after WWII the "Iron curtain" was dropped by western Europe in an attempt to staunch communism.
ANSWER: HUMAN SACRIFICES
I believe it was human sacrifices. The Aztecs built temples honor their gods. Temples provided a place for the music of worship, a place for the private ceremony of personal bloodletting, and a place to conduct the many human sacrifices that the Aztecs believed were necessary to keep their gods happy. Some temples were huge structures.