One way in which the travels of marco polo and
the voyages of zheng he are similar is that both
(1) established colonial territories
(2) stimulated trade
(3) encouraged mass migrations
(4) led to discoveries in africa

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.