The causes of Russia mobolizes along the German border was the support of alliance Russia made with Serbia. The effects was mobilization resulted in German to view Russia's mobilization as a declaration of war so on August 1, 1914, the German government declared war on Russia.
Alliance refers to a relationship in which two countries, political parties, or organizations work together for some purpose. Also, it is a formal agreement or pact, especially a military one, between two or more countries to achieve a particular aim.
In response to Austria's declaration of war, Russia, Serbia's ally, began moving its army toward the Russian-Austrian border. Expecting Germany to join Austria, Russia also mobilized along the German border. As an effect, Russians were crushed, causing the collapse of the Russian empire, and the rise of the Soviet Union.
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