Answer: Russia mobilized its forces, prompting Germany to declare a two-front war against Russia and France.
More details:
Various systems of alliances were put in place before World War I. The two main alliance systems were the Triple Entente, which had Britain, France and Russia as allies, and the Triple Alliance, which had Germany, Austria-Hungary, and Italy as allies. There were also other alliances, such as Russia taking on recently independent Serbia as an ally, as both had ethnic Slavic populations.
So here's how the start of World War I happened. When the Austrian prince and his wife were assassinated in Serbia, the Austrian government threatened the nation of Serbia with retaliatory action (even though the assassination was carried out by a terrorist group, not the Serbian government). Russia responded to Austria's threat, because Russia was bound to protect its Slavic ally, Serbia. Germany responded to the mobilization of Russian troops, and when Germany declared war on Russia in 1914, they implemented a military plan (the Schlieffen Plan), which assumed war would mean they'd have to take on all members of the Triple Entente alliance. So as soon as Germany declared war on Russia, they sent troops to go attack France. That pulled France and Britain into the war immediately as well, and the war spread and became a global conflict.
5. The United States wanted to acquire the Mexican Cession to B. complete the transcontinental railroad across the Southern United States.
However, it is important to note that this is also part of the Manifest Destiny. However, in this case, the more accurate answer is B, as the Gadsden purchase was used to create a easier route for the railroads to get laid (as the area surrounding were mountainous). However, it also played an important role in the Manifest Destiny, as it continued the policy of continuing to expand westward (though south west).
6. I believe it is A. Factors of the Creation of the Monroe Doctrine., especially in the long run.
The Monroe Doctrine was created during the presidency of James Monroe, who was office from 1817 - 1825. You must remember that the Louisiana Territory was under French rule, Florida, and south-western parts of the United States was under Spanish rule, and other European countries claiming smaller territories within the current US. However, with the purchase of the Louisiana Purchase as well as the Gadsden Purchase and the Acquisition from both the Texas Independence (in which Texas joins the Union), and the Mexican-American War, the US gained large amounts of territory at once, as well as large amounts of population. The Monroe Doctrine was an ultimatum to European countries, in which the US was the regional power, and that it would use it's resources to "protect" it's neighbors and it's own interests. In this case, the European countries were not to interfere with territories in the US, creating the U.S. sphere of influence. However, existing colonial powers were not removed by the U.S.
~
there has been multiple wars in history which war are you talking about
I think It would be <span>magistrastes</span>
Africa was the most affected.
