Answer:
sputnik
Explanation:
it was a small satellite that made a radio signal that could be heard on earth
The sioux indian attacks on stagecoach lines.
<span>The causes of the Sand Creek massacre
were rooted in the long conflict for control of the Great Plains of
eastern Colorado. The Fort Laramie Treaty of 1851 guaranteed ownership
of the area north of the Arkansas River to the Nebraska border to the
Cheyenne and Arapahoe -that part was sighted off history.com- </span>
I'm pretty sure the answer is B. the Lost Generation was the name for the men who came back from fighting WWI.
Robert Oppenheimer, was brought in for the Manhattan Project. Top Secret, they were worried about him at first, but realized he was a genius. What is the Manhattan Project? The race to build the world's first atomic bomb during World War 2. Robert Oppenheimer was called in to be the main man to basically make the atomic bomb real.
