Because in 1867, Ulysses S. Grant charged Sheridan with pacifying the Great Plains, where warfare with Native Americans was wreaking havoc. In an effort to force the Plains people onto reservations, Sheridan used the same tactics he used in the Shenandoah Valley: he attacked several tribes in their winter quarters, and he promoted the widespread slaughter of American bison, their primary source of food.
Answer: in order
Qin dynasty
Zhou dynasty
Han dynasty
When World War I broke out in August 1914, both the Central Powers and the Allied Forces believed that it would be over by Christmas of that year.
One of the most important reasons that the First World War lasted so long was the failure of the Schlieffen Plan. The Schlieffen Plan was an operational plan used by the Germans to take over France and Belgium and carried out in August 1914.