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One of the saddest facts about World War I is that millions died needlessly because military and civilian leaders were slow to adapt their old-fashioned strategies and tactics to the new weapons of 1914. New technology made war more horrible and more complex than ever before. The United States and other countries felt the effects of the war for years afterwards.
The popular image of World War I is soldiers in muddy trenches and dugouts, living miserably until the next attack. This is basically correct. Technological developments in engineering, metallurgy, chemistry, and optics had produced weapons deadlier than anything known before. The power of defensive weapons made winning the war on the western front all but impossible for either side.
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It was on 9 November 1989, five days after half a million people gathered in East Berlin in a mass protest, that the Berlin Wall dividing communist East Germany from West Germany crumbled. East German leaders had tried to calm mounting protests by loosening the borders, making travel easier for East Germans.
During the early 2000s, the most popular music file-sharing service in comparison with others is: Napster.
A music file-sharing service refers to an online platform that has a network of computers to allow its end users store and stream digital musical files over the Internet, as well as download music for offline playback. Some examples of a music file-sharing service are:
Napster is a music file-sharing service that was established and launched on 1st of June, 1999. It typically started the digital music revolution by pioneering peer-to-peer (P2P) file-sharing of digital musical files in the early 2000s.
In conclusion, Napster was the most popular music file-sharing service in the early 2000s.
Read more on file-sharing here: brainly.com/question/6251970
D: buying and selling online