What river systems the worlds earliest known civilization develop ?

How did the united states surprise other delegates at the washington naval conference in 1921?

Which of these did the soviet union do in 1961? it built a wall through berlin to keep people from moving to the west. it used force to destroy a wall the united states had built in berlin. it convinced the british and french to merge their zones in berlin with the soviet zone. it threatened to bomb berlin if the united states did not leave within 30 days.

Atex imposed on imported or exported goodies is called a