The US were wanting to focus on their own economic troubles. When everything was so chaotic they wanted to just focus on themselves at the time.
One of the main reasons Rome did not expand farther north was because this area was inhabited by several hostile tribes and groups, that became too much of a headache for the Romans.
The period between 1870 and 1914 saw a Europe that was considerably more stable than that of previous decades. To a large extent this was the product of the formation of new states in Germany and Italy, and political reformations in older, established states, such as Britain and Austria. This internal stability, along with the technological advances of the industrial revolution, meant that European states were increasingly able and willing to pursue political power abroad.
Imperialism was not, of course, a concept novel to the nineteenth century. A number of European states, most notably Spain, Portugal and the Netherlands, had carved out large overseas empires in the age of exploration. However, the new technologies of the nineteenth century encouraged imperial growth. Quinine, for instance, allowed for the conquest of inland Africa, whilst the telegraph enabled states to monitor their imperial possessions around the world. When the value of these new technologies became apparent, the states of Europe began to take control of large swathes of territory in Africa and Asia, heralding in a new era of imperialism
The German government helped him return home.
Revolutionary activity broke out in Russia in February, 1917 -- during the time of World War I. Germany and Russia were on opposite sides in that war, and the German authorities hoped that the return of Lenin to Russia would help foment further revolution there and hurt the Russian government's ability to wage war in Europe. They were correct in that assumption. The major revolution in Russia, known as the Bolshevik Revolution, occurred in the fall of 1917. In March 1918, the new Soviet Russia government ended its participation in the war, signing the Treaty of Brest-Litovsk.
C. They include <span>a bibliography and citations to credit the sources.
This is because a secondary sources uses PRIMARY SOURCES for </span>information.
