<h2>Russia began to mobilize its troops along Germany's borders.</h2>
Explanation/context:
The systems of alliances and military plans which were put in place before World War I presupposed a major war between the countries which were tied together with alliances. The Triple Entente had Britain, France and Russia as allies. Germany was part of a group of allies in opposition to the Triple Entente.
So here's what happened to start the Great War (World War I). When an Austrian prince and his wife were assassinated in Serbia, the Austrian Empire 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 the Schlieffen Plan (drawn up by one of their generals), which called for them to go on attack vs. France. That pulled France and Britain into the war immediately as well, and the war spread and became a global conflict.
In terms of studying that attitude and mentality, it would be helpful to study the journals of someone moving Westward during that time period (mid to late 19th century).
It further showed the influence that the church had on the crown. It showed that the papacy didn't mind going to war for what they wanted. It rallied the country together for a common cause, looking up to the papacy.
Britain had important military sucess in the south, as well with the loyalist in the south being strong. The west had important figures of all time during the fgigging with great generals
"They promised bills and laws in favor of immigrants in exchange for votes" is the one way among the following choices given in the question that political machines, such as Tammany Hall, work with and for immigrants.