They started between 1961 to 1981.
Answer:the Zimmerman telegram and unrestricted submarine warfare
Explanation:Germany tried to contact Mexico via Telegraph to try and persuade them to attack the US so that they would be preoccupied and not join the war. The sinking of the Lusitania was the unrestricted submarine warfare
Geocentric theory is an astronomical theory which describes the universe as a Geocentric system, i.e., a system which puts the Earth in the center of the Universe. In Greek "ge" means earth.
Your answer is Earth.
Answer:
lenin died and rose to power.
Explanation: