When did commodore matthew perry of the u. s. navy "open" japan to u. s. trade?

Which of the following could affect the human population? a hurricane makes landfall on an uninhabited island. a deadly virus emerges that can pass from human to human. a civil war breaks out in italy. a solar eclipse occurs.

Using complete sentences, compare and contrast the leadership and accomplishments of martin luther king, jr. and frederick douglass.

How long have counties been a part of the government structure of the united states?