Reasons germany became involved in the war

answer:   it declared war on russia. the german invasion of belgium caused britain to declare war on germany on august 4. most of the main parties were now at war. in october 1914, turkey joined the war on germany's side, becoming part of the central powers.

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in 550 b.c.e. cyrus the great, the leader of the persians, conquered the medes and united the iranian people under one ruler for the first time. cyrus became the first king of the persian empire and went on to establish one of the largest empires in world.