Shi Huangdi was an effective leader because he was the first Chinese emperor that managed to unite the northern China and responsible to the first development of China's great wall.
Not only that, he is also the one that introduces China to the usage of money as a medium of transaction.
Down the great rivers that flow into the Baltic Sea. Then the sailors would portage (carry and drag) their ships between rivers, heading for southern flowing rivers, such as the Dneiper and Don,
Czechoslovakia is the correct answer
