Why did trench warfare develop ?

What’s the negative consequences of telegraph ? explain in your own words

Question 1(multiple choice worth 5 points) the yalta conference failed to achieve which outcome? germany would be divided into zones of occupation. stalin would support the effort to create the united nations. stalin would join the war against japan after germany's defeat. german zones of occupation would have free elections.

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