Which amendment protects individuals right to protest?

The 1st Amendment

Explanation: The right to join with fellow citizens in protest or peaceful assembly is critical to a functioning democracy and at the core of the First Amendment. Unfortunately, law enforcement officials sometimes violate this right through means intended to thwart free public expression.

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.